What secondary characteristic commonly develops in males during puberty?

The development of a deeper voice during puberty is a significant secondary sexual characteristic in males, primarily due to the effects of increased levels of testosterone. As boys enter puberty, their larynx (voice box) grows, and the vocal cords lengthen and thicken, resulting in a lower pitch of the voice. This change is a notable aspect of male maturation and is often one of the first physical signs of puberty that is noticeable to peers and others.

The process of voice deepening reflects the broader physical changes occurring during puberty, where males experience various hormonal changes that contribute to their overall development. This includes the growth of facial and body hair, increased muscle mass, and changes in body fat distribution, all influenced by testosterone levels. The deepening of the voice is often a central marker in discussions of male development during adolescence.