Answer:
I can't see the scene , I don't know but all I can say is explain what you see
to sing in the choir is an infinitive. an infinitive is a basic form of a verb doesn't necessarily need a subject like it's understood so the understood subject is there when the phrase is said so "sing in the choir is your basic verb so it's an infinitive
Persuasive. Persuasive is when the author wants to convince the readers of something.
