What happens during puberty for boys?

• A. Breasts develop; periods start
• B. Testicles & penis get bigger; hair grows in pubic area & armpits; muscles grow, voice deepens, facial hair develops
• C. Voice deepens only
• D. Hair grows on arms only

Answer: (B)

Puberty in boys is driven by rising testosterone, which triggers several physical changes as the body develops toward adulthood. The testes and penis grow, signaling maturation of the reproductive system. Hair begins to grow in the pubic area and under the arms, and muscle mass tends to increase. The voice deepens as the larynx enlarges and the vocal cords thicken, and facial hair usually starts to appear. These changes typically occur during the early to mid-teens and are part of a broader growth spurt and other skin changes that accompany maturation. Other options describe puberty changes that are more typical of females (breasts and menstruation) or only mention a single change, which doesn’t capture the full set of developments boys experience.