Answer:
Common changes occur among boys and girls during puberty:
Sudden increase in height.
••Change in body shape
••Change in voice. In boys' voices become deep and harsh, in girls it is a high pitched voice.
••Increased activity of sweat and sebaceous glands.
••Reproductive organs begin to mature.
••Appearance of secondary sexual characteristics.
B. Changes in Boys during puberty:
••Facial hairs such as beard and moustaches develop.
••Hair develops under the armpit, under chest and in the pubic regions.
••Voice becomes deeper.
••Muscles develop, and shoulder becomes broad.
Increase in weight.
C. Changes in Girls during puberty:
••Development and enlargement of breasts.
••Hair develops under the armpit and in the pubic regions.
••Hips broaden and pelvic region widens.
••Initiation of menstrual cycle.
••Deposition of fat around hips.