First, you find the simple subject and simple predicate.
If the '-ing' form of the verb is not part of the simple predicate, then determine how it is used in the sentence. If it's in a noun position, then it's a gerund. If it is used as an adjective, then it will be a participle.
C, a mystery because the sea holds many unknowns
I don’t even write my own essays
6 white arrows? what does that mean. XD anyways
if you mean details as in details about the deer, than the deer has nice green eyes, "The headlights turn their dark eyes green." They're "Calm as ponds," and they liked sitting under a tree in a families backyard. I hope this helped, sorry it kind of sucked as an answer. :/