The correct answer is D) physical changes.
The development changes that are associated with puberty are physical changes.
Puberty. Time of changes in your body. Physical changes are manifested during puberty. Approximately between ages 8 to 14 (it is not the same for everyone), boys and girls start to see many changes in their bodies and some, in their emotions. Hormonal changes produce more testosterone in boys and estrogens in girls. Among the changes adolescents can perceive are the grow of underarm hair, pubic hair, change in voice, an increase of weight, and acne.