Biological Environment
This is the type of environment which consists of all living things or organisms.
Examples are Human Beings, Animals, Plants, microorganisms (Fungi, Bacteria).
One important thing about the Biological Environment is that all living things depend on each other for some sort of existence, this could be for food thus forming the food chain (animals feeding on each other or on plants… carnivores, omnivores and herbivores).
Human beings and animals also provide Carbon dioxide (CO2) for plants which they recycle and then release Oxygen back into the atmosphere.