A common answer would be either depression or post-traumatic stress disorder.
Answer:
the study of the structure, reaction, and composition of different kinds of substances
Explanation:

Answer:
B
Explanation:
Get a referral from his primary care physician.
Answer:
Imitation
Explanation:
Imitation is a behavior that leads to the formation of traditions, through the imitation of what is accepted and recognized by a group of individuals who identify with a certain situation
Answer:
I don't know but good luck :)