The fist questions answer is
4) infinitive
He did it because they were socs and he's a greaser, and he knew messing with them would get them agitated. I think he did it to make fun of them.
Imagery. Authors use imagery to engage a readers senses.
(Imagery is being very descriptive so that the readers can almost imagine that they were actually where the author is describing. This can be achieved through descriptions of the senses, for example what is around them, like describing a flower patch, and what colors there is, and the bees flying around getting pollen, and the sweet smell spread through the air, and how the wind feels as it goes through your hair)
Try answer B maybe, sorry if this is incorrect. hope it helped!