[___] is when adolescents reach sexual maturity and become capable of [___]. During this time, physical and emotional changes occur and are influenced by the [___] system, which releases hormones into the bloodstream.

Puberty is the period when adolescents reach sexual maturity and become capable of reproduction. Hormones released into the bloodstream by the endocrine system guide many of the physical and emotional changes during this time. So the first blank is “Puberty.”

AI-written and checked against the verified answer.