The answer that fits the blank provided above is BROTHER. This question is based on Harper Lee's novel "To Kill a Mockingbird". So when Atticus returns home for the first time after the trial, Aunt Alexandra empathized for him and called him Brother. Hope this helps.
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