An adolescent asks you what the term "puberty" means. What is your best response?
a) "It denotes the beginning of secondary sex characteristics."
b) "It is the time span between 12 and 18 years."
c) "It is the time span that denotes the onset of maturity."
d) "It is the age at which one first becomes capable of sexual reproduction."
Answer: "It is the age at which one first becomes capable of sexual reproduction."