Good stuff!
What is a brain?
In biology, the unitary approach makes it explicit why no organism can be thought of without an environment. An organism as a skin bag is no functioning system; it may be such only together with the relevant environmental parts. The same applies to neurophysiology or “cognitive” brain research: without the rest of the world the nervous system is not a system at all; neither is the agent of the behavior a part of the body, such as the brain.