Question 3 is darkroom.
Question 14 is the last choice "My favorite part is meeting new teachers and friends."
Its from ''To Kill a Mockingbird" and Atticus tells that line to scout.
Answer: To persuade
Explanation:
The speaker is implying that there will be unpleasant consequences if one does not study the problem carefully, and they are trying to persuade you to do so to avoid unnecessary consequences.