Introvert= Less sociable, keeps more to self
Extrovert= outgoing, sociable
Personally-
I would say I am about 60% an introvert and 40% and extrovert. When I am at school, I try to keep more to myself. I like to be by myself and focus on schoolwork. When I am with friends I tend to be more extroverted because I am comfortable with them. I talk more, not only to them, but also to people i do not know.
B. No one can be as charming as my father can. A. Would be prettiest, C, Would be least, and D. Would be farthest.
I'd say peacefulness and relaxation. There's no given reason for the trees to be sad or longing, and trees don't obviously exhale or breathe.