The correct answer is D.Tiger sharks, which are voracious eaters, eat fish, seals, birds, and even old tires.
Step-by-step explanation:
In grammar, an appositive phrase is a set of words that renames or provides information about a noun or pronoun that is placed before the appositive phrase, because of this, it is common appositive phrases are separated from the rest of the sentence by commas and are placed after the noun or pronoun they rename.
In the case of the two sentences presented "Tiger sharks are voracious eaters" and "They eat fish, seals, birds, and even old tires" the set of words or appositive phrase that renames or describes the main noun and subject "Tiger sharks" is "are voracious eaters", because of this the sentence that combines the two previous sentences by using an appositive is "Tiger sharks, which are voracious eaters, eat fish, seals, birds, and even old tires", considering in this sentence the use appositive to rename the noun is correct and the information of both sentences is included.