Mrs. Haddad, the sex education teacher, tells the class that at puberty, changes will begin to occur in the bodies of both males and females. Females will experience breast development, their hips will broaden, and their overall body shape will change. Males will grow facial hair and their voices will deepen. Mrs. Haddad is explaining

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Secondary sex characteristics are physical changes that occur during puberty but are not directly involved in reproduction. These include breast development in females, broadening of hips, growth of facial hair in males, and deepening of the voice, as described by Mrs. Haddad.

Mrs Haddad, the Sex Education Teacher, Tells the Class That