Question

what changes in voice sir observed in adults and boys and girls

Answer 1

$\textbf{Hey Mate!!}$

✴ CHANGES OBSERVED IN VOICE OF GIRLS AND BOYS DURING PUBERTY ARE :

♦ GIRLS : Voice becomes sweet.
♦ BOYS : Larynx enlarges and voice deepens.

Hope it helps.
@charlie16.

Answer 2

girl's voice become very sweet and boy's become very harsh