Chemical change are the process that can not be reverse or redone i.e. if any change is made in the state of the substance then it cannot be change back to its initial state.
Physical change is opposite to chemical change, in physical change process can be reverse or redone.
Answer: By looking at the biological bases of human behavior, psychologists are better able to understand how the brain and physiological processes might influence the way people think, act, and feel.
