This is more of a psychology question than an English question, but coping mechanisms in general are all used to deal with stress. Stress covers a variety of influences as anything that affects one's mental or physical state.
Answer:
moving from the country of one's birth place to a new country to settle and live there permanently.
For he thinks that this kind of friendship can exist only when one spends a great deal of time with the other person, participating in joint activities and engaging in mutually beneficial behavior; and one cannot cooperate on these close terms with every member of the political community.
