Life energy can be called certain biological energy absorbed and released during the body's life. In general, life on Earth is connected with the activity of the Sun, and it is solar energy that is processed by living beings on Earth into biological energy. First of all, plants' growth depends on the Sun's activity, and the chemical reactions inside them take place with the help of chlorophyll. Further, all those who eat these plants and those who have eaten these plants acquire this energy in a chain. Since this vital energy is released in the world all the time, a little bit during the organism's life and a lot - at the time of death, the Magus can consume this energy. It's better not to touch people because their energy is "dirty." After all, it carries all the information inherent in people, and there can be illnesses and many bad things in general.
Initially, lifeforce is accumulated by plants. Plants absorb water, and minerals from the soil, generate oxygen through respiration, and use carbon dioxide to absorb fire energy from the Sun. Plants are the primary energy source for animals. Animals can be seen as energy harvesters that consume massive lifeforce amount from whole energy fields. This lifeforce is converted into vitality and power, which allows animal lifeforms to go further in evolution and develop brain, vitality, and strength. Predators consume lifeforce not from large fields of plants but from concentrated lifeforce from animals themselves, and they are a step higher in development and evolution. Predators don't spend half a day chewing grass.
Life Element could be seen as cruel, as living things must eat other living beings to survive. Energy and fuel do not come cheap. Even the oil you burn now to drive your car comes from dinosaurs' biomass. But that is the principle and the law of life. There is a natural cycle of life and death; as living is born, it will grow, develop, age, and die. If you do not eat a mango once it is produced, it will rot and die anyway. The plant can be interested in fruit having an appeal for animals. When an animal eats the fruit, the seeds that cannot be digested; are transported with animals moving, so the plant has some chance to spread and grow from seed in another place.
More importantly, life is an organic, dynamic self-regulating system of countless living organisms. Without predators, animals would consume and destroy all plants and cause a worldwide disaster. Predators keep animals in check, and by hunting down the weakest and unhealthiest, they also ensure a healthy genetic code and future generations. You can already see how life and death are closely connected to the development of the whole species and egregores.
There are known stories of bringing one animal species to another continent and causing a lot of issues, as it either drives competition out towards extinction, reducing available biodiversity, or having no natural predators to keep them in check; it destroys the habitat, risking the loss of biodiversity and lasting damage to biocenosis. For the same reason, while hunting animals may seem cruel, in some cases, it is necessary to keep the growing animal population in control and prevent bigger issues from happening. Unfortunately, humans are not always considerate of the habitat to keep things in balance, and many species are driven to extinction by humans.
Life element is based on the Anahata chakra level of vibrations. The world of the living is located somewhere in the middle between the Light World and the Dark World. It is between Tiferet's perfect beauty and Yesod's aggressive darkness. It shows in living organisms, which can be both beautiful and dangerous. People like watching cat videos online and sharing cat pics, and they seemingly forget that cat is a dangerous predator that hunts and kills other living beings and consumes their flesh while they are still alive. Cats can torture and play with dying prey for pleasure.
The life force as an element has existed for a long time and does not go anywhere. Life forms may change, and some animals and plants go extinct, but life remains. The age of dinosaurs and giant pterodactyls could be reminded as an instance of lifeforce's past. Life energy is a mighty power throughout the planet, transmitting a global signal to live.
Initially, there is a project of a life form, a plan, which then materializes. This project exists on the level of the spirit world and is based on egregores function. The existing living systems and species' families may change over time as the project goes through alterations to adapt and survive.
Moreover, many Life species do not have individual-separate consciousness. In the hive mind, there is a superconscious, which develops, and different life forms are only parts of it. You see an ant and think it is an individual organism, but it is more like a part of something bigger and multidimensional that you cannot see or perceive with your eyes. Some other life elementals can gain individuality traits and personalities through rich life experiences, often returning to the source at the end of life. In other words, many living forms do not have reincarnation mechanisms in the same way as humans. Individuals die, but egregore evolves and continues to exist. Cats might have a short lifespan and be vulnerable, but cats as species have been present on the planet for millions of years.
Humans are more individualistic; there is still an egregore of humanity and civilization that has gone far beyond normal personal development. An average human can't learn everything science offers in a lifetime. But due to individualistic soul nature and reincarnation quality, some of our species have gone far beyond the common norms and limits, acquiring the ability to evolve through training and continue their path through incarnations continuously; they are stepping towards godhood. In comparison, most of the population is at the level of monkeys looking for bananas in life, with simplistic goals of temporary happiness. They don't consider self-development a viable path in life. They tend to believe that life is only one, so it becomes a tool of self-gratification.
Overall, Life World consists of many species, which can also become extinct with time. Humans as species may go extinct as well. Humanity is the dominant species on Earth's Surface, which is why the planetary egregore is built on us. But the Element of Life has been before humans and will be long after. It is a power of a different scale and dimension that cannot be understood or evaluated properly through any modern scientific means.