Question

puns were used by shakespeare to
explain historical background to the audience.
add humor or hidden meanings to a scene.
create a tone of confusion in his plays.
encourage audiences to listen more carefully.

Explanation:

Puns are word - play that can add humor or convey hidden meanings. Shakespeare often used them to enrich his plays in these ways. They were not mainly for explaining historical background, creating confusion, or just making audiences listen more carefully.

Answer:

add humor or hidden meanings to a scene.