Identify the adverbial clause in the following sentence : A remora is a fish that attaches itself to the body of a shark.

Question

A. a remora is a fish

B. that attaches itself

C. to the body

D. of a shark

Answer 1

It is "B, that attaches itself". We can assume this because "that" is a start of an adverbial.

Answer 2

I would say the answer is B - that attaches itself. Clauses have their own subject and verb (in this case I would say the word that = the subject and attaches = the verb). The adverbial clause adds relevant and descriptive information to the statement "the remora is a fish." It tells us what the fish does (i.e. attaches itself to the body of a shark).