He lives a solitary life and does not interact well with others.
The war also spread to Europe as France and Britain looked to gain supremacy in the Atlantic World. After initially remaining neutral, the Ohio Country Indians and most of the northern tribes largely sided with the French, who were their primary trading partner and supplier of arms
Social psychology is the correct answer.
The social part refers to your definition - how we behave around other people, when we are part of a society. Psychology has to do with our thoughts, feelings, and behavior, and social psychology deals with how those change based on who we are around.