Question

match each sentence part to the question it answers.
which part includes the subject and main action?
which part tells the reason for the action?
which part tells how the action is done?
answer bank
to convey different singers and instruments in a whole band
gesturing rapidly to keep up and expressing the rhythm with their whole bodies
interpreters use their hands and faces and show the dominant sound at any given moment

Explanation:

1. For "Which part includes the subject and main action?"

The sentence part with a subject (interpreters) and main action (use, show) is "interpreters use their hands and faces and show the dominant sound at any given moment". It has the doer (interpreters) and what they do.

"To convey different singers and instruments in a whole band" explains the purpose (reason) for an action, as "to + verb" structures often indicate purpose/reason in sentences.

"gesturing rapidly to keep up and expressing the rhythm with their whole bodies" describes the manner (how) of performing an action, with details about the way (rapid gesturing, using whole body) the action is carried out.

Answer:

interpreters use their hands and faces and show the dominant sound at any given moment

2. For "Which part tells the reason for the action?"