The first law of thermodynamics states that energy can neither be created nor destroyed. In other words, the amount is constant. Energy can, however, be converted. Energy will be lost here in the form of heat. Entropy is defined, ecologically, as randomness.
Humans have low entropy.
An organism is highly organized and is not randomly distributed. It must use energy to fight entropy. If an organism stops using it, death will occur. No organism can live to itself. Within a community there is competition for food.