Question

which change occurs only in males during puberty?
a deepening of the voice
a change in body odor
the appearance of pubic hair
the beginning of menstruation

Explanation:

During puberty, males experience a deepening of the voice due to the growth of the larynx and vocal cords. Change in body odor and appearance of pubic hair occur in both males and females. Menstruation is a female - specific change.

Answer:

a deepening of the voice