Two features seen in boys are-

a) Change in body shape- The shoulders become broader and chest wider. Muscles grow prominently. They develop beards, moustaches on their face.

b) Deep and hoarse voice- The voice box of boys are larger than girls but at puberty, the muscles present in voice box grows and it can be seen as a protruding part of throat known as Adam’s apple. So males develop deep and hoarse voice.

Features in girls-

a) Change in body shape- Their pelvic region widens, hips broadened, development of breasts.

b) Change in voice- High pitch voice.