What common character trait do tragic heroes share?
a. they must fight fate in order to make their own decisions.
b. they have a flaw that will ultimately lead to their undoing.
c. they commit terrible crimes to satisfy their ambitions.
d. they are unusually strong and powerful warriors.

b. They have a flaw that will ultimately lead to their undoing.

The most common characteristic of tragic heroes is the fact that, although excellent in every other way, they have a tragic flaw that will eventually lead to their undoing. This is also known by the term hamartia. Some common examples are Othello's jealousy or Hamlet's indecisiveness.

b would have to be the answer