Cave is a smaller section of a cavern. A song is a smaller part of a tune. Therefore, one is the bigger picture (second section) and the other is the smaller picture (first one) Hope this helps!
Coordinating conjunctions bring two clauses (subject + verb + object) together. When joining two ideas, the comma is used.
Brutus claims to be an honorable man, but he stabbed Caesar.
Contrast conjunctions introduce a contradiction with what is said before (Brutus is honorable or honest, but he is a killer).
Excitement, should be the answer! I cannot tell much more because there is not much context. I hope you pass your exam, though :>
Answer:
Review your research question.
Explanation:
The thesis statement is your opinionated response to that question.