I cant see the rest of the passage, but im taking a guess that it is no.2!
16-17 antonyms 18-19 synonym 20 antonyms
Answer: Commentary
Explanation:
Writing commentary means giving your opinion, interpretation, insight, analysis, explication, personal reaction, evaluation or reflection about a concrete detail in an essay. ... Writing commentary is higher level thinking. Commentary is what makes an essay interesting to read.
It would be a character(s) who is against the main character, an opponent.