Final answer:
The movement of the larynx lower in the neck during puberty, particularly in males, is a developmental change that results in a deeper voice.
Step-by-step explanation:
When the larynx moves lower in the neck, it is considered a developmental change associated with puberty in males. During puberty, testosterone causes the larynx to grow and move down the neck. This process, often referred to as the 'adam's apple' becoming more prominent, leads to a deeper voice. It is a secondary sexual characteristic that indicates maturity.