During adolescence, the boys and girls undergo certain physical changes, a few of which are given below. (i) Change in voice (ii) Development of breasts (iii) Growth of moustache (iv) Growth of facial hair (v) Pimples on the face (vi) Growth of hair in the pubic region (vii) Growth of hair in armpits. Categorise these changes in the table given below:
Observed only in boys: Growth of moustache, Growth of facial hair. Observed only in girls: Development of breasts. Common in boys and girls: Change in voice, Pimples on the face, Growth of hair in the pubic region, Growth of hair in armpits.
Explanation
Section 6.1 explains these changes: 'Development of breasts' is mentioned specifically for girls. 'Growth of moustache' and 'Growth of facial hair' are mentioned for boys (boys develop facial hair which later grows into moustache and beard). 'Change in voice' occurs in both—boys have more prominent changes due to larger voice box growth, but girls also experience slight voice changes. 'Pimples on the face' (acne) is common in both. 'Growth of hair in the pubic region' and 'Growth of hair in armpits' are explicitly stated as experienced by both boys and girls.