If whipped is not a part of the underlined sentence, we can rule out a verb, leaving "through the massive trees" which is an adjective phase, as it is describing the "massive" trees.
Answer:
I would just define it as being thankful
Explanation:
Hi there,
A dependent clause is group of words that also had a subject and a verb, but it is not a very complete thought . An independent clause has a complete thought and makes sense. It can stand on its own, while dependent clauses cannot not.
So I believe the answer should be A. dependent clause cannot stand alone; an independent clause expresses a thought on its own.