Question

the muscle located on the side of the jaw that assists in chewing and talking:
o trapezius
o masseter
o deltoid
o mandible

Explanation:

The masseter muscle is located on the side of the jaw. It is a key muscle involved in chewing (mastication) as it elevates the mandible (lower jaw). The trapezius is a large muscle in the upper back. The deltoid is a shoulder muscle. The mandible is a bone (the lower jaw bone), not a muscle.

Answer:

masseter