Final answer:
The climax of Julius Caesar is considered to be Act III because it involves the main conflict of the play and the assassination of Julius Caesar.
Step-by-step explanation:
The climax of Julius Caesar is considered to be Act III because it involves the main conflict of the play and the assassination of Julius Caesar. The climax is the peak of the action and the central event where the conflict comes to a head. In Act III, Julius Caesar is assassinated by the conspirators, which sets off a chain of events and resolves the main conflict of the play.