I think it is hot, but I might be wrong if I'm right please mark me as the brainiest answer.
Answer:
B
Explanation:
Colons are used to add onto a sentence without making it a run on or changing the subject.
1. narwhal what Aronnax thinks the monster may be (a sea unicorn)
2. Abraham Lincoln United States' government boat
3. static character does not change
4. scientist Aronnax
5. shaped like a cylinder Nautilus
6. denouement name of the resolving action after the climax
7. 20,000 Leagues Under the Sea science fiction