Explanation:

It is involved in breathing, producing sound, and protecting the trachea against food aspiration.
The larynx houses the vocal folds, and manipulates pitch and volume, which is essential for phonation. Phonation refers to any oscillatory state of any part of the larynx that modifies the airstream, of which voicing is just one example.
Pitch is the quality that makes it possible to judge sounds as "higher" and "lower" in the sense associated with musical melodies. Pitch may be quantified as a frequency, but pitch is not a purely objective physical property; it is a subjective psychoacoustical attribute of sound.
The larynx is situated just below where the tract of the pharynx splits into the trachea and the esophagus.