Answer:
D. Phrase.
Explanation:
In the given sentence, the underlined words "under my grandmother's bed" is a phrase. This is because phrases are words or groups of words that do not form a clause or are not a full sentence of its own or do not have a verb and at least one subject.
So, the underlined words in the sentence is an example of a phrase and are used only to add detail or information to the already completed sentence "I found some old coins".
Thus, the correct answer is a phrase.
