Question

When an adolescent’s facial hair starts growing, or acne develops, or breasts start to grow, or genitals start to change, which organ in the body are these changes directly caused by?
A. The hypothalamus
B. The adrenal gland
C. The pituitary gland
D. The ovaries or testicles

Answer 1

The physical features specifically involved in reproduction, are caused by a particular gland. The secondary sexual characters are those traits that help to differentiate between the male and female body. There are physical or behavioral features that occur at the time of puberty in humans.

Complete answer: Puberty is the tactic of physical changes through which a person's body matures into an adult form capable of reproduction to go through fertilization. The onset of puberty is seen earlier in women, between eight and thirteen years more matured lasts two to four years. Puberty starts at the start of adolescence. Primary sexual characteristics are the physical characteristics directly concerned in copulation, as the sex organs like the testes, ovaries, and external genitals. Secondary sexual characters are those that facilitate the differentiation of characteristic male and female bodies from one another. They're physical or behavioral characteristics that seem in humans at the time of pubescence. So once an adolescent's facial hair starts growing, or skin disorder develops, or breasts begin to grow, or the private parts begin to alter the ovaries or testicles show changes.
So, the proper answer is D-'The ovaries or testicles'.

Additional information:
The secretions of sweat and fatty glands in adolescents will increase which ends up in symptoms, and disease of the skin. Now, the bones of the arms and legs elongate and create an individual tall. Females attain puberty at the age of thirteen years. FSH induces the development of ovaries that successively manufacture estrogen. Estrogen is accountable for the development of secondary sexual character in females.

Note: Puberty is that the time throughout those adolescents develop secondary sexual characters and become capable of a copy. It starts once the brain offers secretion signals to the sexual organs. It results in physical and psychological changes. Breasts in females, pubic hair in both males and females, beard in males, and voice change in males are some other changes happening during puberty.