Answer:
The element of Greek tragedy that refers to the tragic flaw within the protagonist that helps bring about his or her downfall is hamartia.
Step-by-step explanation:
Hamartia which comes from the Greek is a term that is used to refer to a "mistake" or "tragic error" like a flaw or a sin. Hamartia normally occurs to the heroes, they are the ones that present this situation in their actions and they are faced to a situation where being them the hero they want to do the right thing but after not being possible they fall, and that brings catharsis to the audience.