Final answer:
A tragic complication is added to the plot when unexpected events occur, leading to tragic consequences for the characters involved.
Step-by-step explanation:
A tragic complication is added to the plot when unexpected events occur, causing fear or pity in the audience. This complication is often a turning point in the story, leading to tragic consequences for the characters involved. For example, in Shakespeare's play Romeo and Juliet, the tragic complication is added when Romeo mistakenly believes Juliet is dead and takes his own life. This event sets off a chain reaction of tragic events, ultimately resulting in the deaths of both Romeo and Juliet.