"He exercised while I watch television." because the tenses of the verbs don't match--"exercised" is past tense and "watch" is present.
Rolling around in the dirt is a Fragment. Hope that helps.
B is correct, "<span> Christina and I went to the same summer camp for years (since we were 8)" </span>parentheses are used when you have some extra information you want to add, but its not completely necessary. Like how they started going to the same summer camp when they were 8, you can still read the sentence fine without it, but it's a nice piece of information.
If I’m understanding the question it uses both metaphors and alliteration in the poem which is uncommon because most poetry uses typical one literary device and not multiples at the same time
