Connections and summarizing are the correct words.
The type of figurative language is idiom
C.people who are lonely and isolated are bond to be unhappy
I'm pretty sure it is
A.The Academy award for best picture in 1961 went to musical film "west side story."
I would agree with you - the conclusion should leave readers with an important thought at the end.
This thought should never be new, or opposing to the previous ideas you had been writing before. It also shouldn't be confusing, but quite conversely - it should explain everything and put everything in place.
