Answer:
Brutus's decision to join the conspiracy has led to a catharsis, the death of his wife
Explanation:
According to the passage from act 4, scene 3, of The Tragedy of Julius Caesar, the news of Portia, Brutus's wife was broken to Caesar and he shared in the grief with his friend.
The statement that best describes how an element of tragedy in this excerpt reveals the theme that uninformed decisions lead to tragic ends is Brutus's decision to join the conspiracy has led to a catharsis, the death of his wife.