Which of the following secondary sex characteristics do not develop during your teen years

Development of breast in girls,
development of overseas in girls and testes in boys
development of acne in boys
development of body hair in boys

The correct answer is the development of overseas in girls and testes in boys. These secondary sex characteristics typically begin to develop during puberty, which occurs during the teenage years.

Breast development in girls, development of acne in boys, and development of body hair in boys are all secondary sex characteristics that can be expected to occur during adolescence.

The secondary sex characteristics that do not develop during the teen years are the development of breasts in girls and the development of testes in boys. These changes typically occur during puberty, which generally starts around the ages of 10 to 14 for girls and 12 to 16 for boys. On the other hand, the development of ovaries in girls, acne in boys, and body hair in boys are secondary sex characteristics that can develop during the teen years as part of the normal pubertal process.