Read these sentences.

the curious onlookers swarmed around the car crash.

the curious onlookers assembled around the car crash.

how are the meanings of these two sentences different?

a. the first sentence suggests that the onlookers are well-behaved; the second suggests that they are unruly.

b. the first sentence suggests that the onlookers caused the car crash; the second suggests they witnessed the car crash.

c. the first sentences suggests that the onlookers are ; the second suggests that they are uncooperative.

d. the first sentence suggests that the onlookers are excited; the second suggests that they are calm.