What do you think a "protagonist" and "antagonist" are?

a Protagonist is the leading character or one of the major characters in a drama, movie, novel, or other fictional text.

Antagonist is a person who actively opposes or is hostile to someone or something; an adversary.

Protagonist- The main character in your story the main one. Everything that happens in the story affect the character.

antagonist- A person you can say that is rival with your protagonist. For example he might get in the way to make your protagonist (main character) look bad.

from: "the tragedy of julius caesar by william shakespeare: act 1 "

the correct answer is:

act 1 opens with the forum in celebration and ends with it in chaos.