Sound has four main functions:

a. evoke mood and atmosphere, reinforce the action, reinforce the performers’ voices, and create larger and
louder effects.
b. support the production's style or comments on the action, reinforce the action, create a style for the
production, and amplify the performers’ voices.
c. reinforce the action, reinforce the performers' voices, evoke mood and atmosphere, and support the
production's style or comments on the action.
d. create an atmosphere of gaiety or somberness, amplify the sounds used in production, reinforce the actors'
voices, and support the production's style.

c