Final answer:
The lateral cricoarytenoid muscle is responsible for adducting the vocal folds, allowing for sound production.
Step-by-step explanation:
The lateral cricoarytenoid muscle is a muscle in the larynx that is responsible for adducting the vocal folds. When this muscle contracts, it brings the vocal folds closer together, allowing for phonation or the production of sound.
For example, when singing a high note, the lateral cricoarytenoid muscle contracts to tighten the vocal folds, resulting in a higher pitch.