The difference between the words swarmed and assembled should give you a clue as to what the answer is. Swarmed means to move somewhere in large numbers, usually crowding around something of interest to get a closer look. Assembled means to gather together in one place for a particular reason. This is usually done in an orderly fashion.
The Third One is the correct answer
Here's my answer he used many different internal tragedies in all the passages because he wanted to tell you about his life and how hard it was while he was a slave. I hope this helps.
