select the part of the sentence that the participial phrase modifies. determining how much oil remains from…

select the part of the sentence that the participial phrase modifies. determining how much oil remains from the 2010 spill in the gulf of mexico is difficult, but scientists warn of large amounts of oil trapped under gulf beaches.

select the part of the sentence that the participial phrase modifies. determining how much oil remains from the 2010 spill in the gulf of mexico is difficult, but scientists warn of large amounts of oil trapped under gulf beaches.

Answer

Brief Explanations:

A participial phrase acts as an adjective modifying a noun or pronoun. In the given sentence, "trapped under Gulf beaches" is the participial phrase and it describes the "oil", telling us which oil scientists are warning about.

Answer:

oil