did you mean main idea?
the main idea is the central, or most important, idea in a paragraph or passage.
Answer:
You should be ready for question and hard work
The correct answer is "the downfall of the protagonist"
This is the whole purpose of plays, according to Aristotle. The protagonists in tragedies are usually people better than us who die for a great cause, and their death awakens both positive and negative emotions in us. This is called catharsis.
I would say the answer is d. just as
This is because you are comparing the similarities between two things. The other words either contrast the two things or explain the relationship instead of comparing it.