Question

Clapping wildly, the audience shouted for the band to come back on stage for an encore.

Answer 1

The participle phrase in the sentence is B. Clapping wildly.

Participle phrases are phrases that contain a present or past participle and that function as adjectives. In this case, the phrase Clapping wildly is describing the subject of the sentence, which is the audience. Thus, the participle phrase is giving more information about the subject as if it was an adjective.  

Answer 2

The answer is B what did the audience do to engorge the band they Clapping Wildly