Final answer:
The underlined part of the sentence is a participial phrase. Therefore the correct option is B.
Step-by-step explanation:
The underlined part of the sentence can be identified as a participial phrase. A participial phrase is a phrase that begins with a participle (a verb form ending in -ing or -ed) and functions as an adjective. It provides more information about a noun or pronoun in the sentence.
Learn more about participial phrase