Which element of a Greek tragedy does Tiresias bring?

plot reversal
insight
catharsis
tragic hero

The element that Tiresias brings is inishgt.

Explanation:

Tiresias is a character that prefigures in a lot of the Greek plays as a blind sage and is a rather mythical figure at that.

He is used as a harbinger of good and bad news and stands as the paragon of virtue and knowledge.

It can also be seen in the nature of the word there

The man is blind so the only place he can look is inward and that is where he finds his answers.

Thus the word is also called insight for the activity that he does.

watching over my siblings so they are safe.