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.
Answer:
for me i think the answer would be A
Theatron refers to the seating area section of an Ancient Greek, Roman, and Byzantine theater.
