Answer:
It is the turning point, or climax, of the play, in which Caesar is assassinated, Rome is left without a leader, and the public is frightened.
Step-by-step explanation:
The climax is a decisive moment in a storyline, it´s when the conflict or tension is at its highest point. After the climax, the story starts to goes to a resolution. If we see the story as a stair, the climax is when we finish going up, then we must start to step down of the stair.
In a five-act play, like Julius Caesar, the climax often arrives in act 3.
I hope this answer helps you.