Question

what is puberty ? why change occur in boys and girls during puberty​

Answer 1

Explanation:

Puberty is the age in which the sex harmones and sex gamets start to produce and boys and girls are sexually mature.

Changes occur in boys and girls during puberty due to the release of sex harmones.

Answer 2

$\bf\underline{What\:is\:Puberty?}$
$<b>$
Puberty is the time in life when a boy or girl becomes sexually mature. It is a process that usually happens between ages 10 and 14 for girls and ages 12 and 16 for boys. It causes physical changes, and affects boys and girls differently.

$\bf\underline{In\:Girls}$

In boys, the first puberty change is the enlargement of the scrotum and testes. At this point, the penis does not enlarge. As the testes and scrotum continue to grow, the penis grows. The first growth of pubic hair produces long, soft hair that is only in a small area around the genitals.

$\bf\underline{In\:Boys}$

Girls' bodies increase in size and shape during puberty. Their hips become more rounded and they get a more defined waist.