Question

a person who habitually clenches their teeth may present with an overdeveloped ______ muscle. masseter procerus orbicularis oris zygomaticus major buccinator

Explanation:

The masseter muscle is a key muscle involved in the act of clenching teeth. Habitual clenching leads to its over - development. The procerus muscle is related to facial expressions (wrinkling the nose). The orbicularis oris is for lip movements (like puckering). The zygomaticus major is for smiling (pulling the corners of the mouth up). The buccinator is involved in actions like blowing and keeping food between the teeth during chewing, not primarily in clenching.

Answer:

masseter