Achange in the level of a(n) can effect how you react to certain situations and thus can effect your emotions.

Hormones are a product of various glands in human body and consist of some “signaling molecules”. Usually they are to be found in multicellular life forms. After they are produced, they are carried by the circulation system to other parts of the body and can affect them physically as well as psychologically.

answer; migrate from a region;

well to answer ur question to be completly honest