Which of the following secondary sex characteristics do not develop during the teen years development of their body hair and boys development of acne employees development of ovaries and girls in testing voice development of breast and girls

The secondary sex characteristics that do not develop during the teen years are the development of ovaries in girls and the development of breasts in girls. Both of these characteristics are typically developed during puberty, which occurs in the early teenage years. The development of body hair in both genders, development of acne in boys, and deepening of voice in boys are secondary sex characteristics that usually develop during the teen years.