Final answer:
Makeup in theater is used to signal that the actor is a performer.
Step-by-step explanation:
The use of makeup in theater is a common practice that helps signal to the audience that the actor is a performer. Makeup can transform an actor's appearance, enhance their features, and help them portray a specific character or role. It is a visual cue that reminds the audience that what they are watching is a work of art, not reality. For example, the use of exaggerated makeup in a clown character helps convey the performer's comedic role and adds to the overall theatrical experience.