The narrator is looking for Rev. Leonidas Smiley as his friend told him to.
A. by using it to introduce new characters and develop main characters!
pasttimes that need dexterity
Answer: passive
Explanation: The subject or who is performing the action is not clear and in an active sentence, there is importance placed on the person who is performing the action.
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.