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(B) Adolescence is the period of transition between childhood and adulthood,characterized by significant physical and hormonal changes.Sexual maturati

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Cracking of voice

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(B) Adolescence is the period of transition between childhood and adulthood,characterized by significant physical and hormonal changes.Sexual maturation in boys is driven by the secretion of the hormone $Testosterone$.Key secondary sexual characteristics in boys include the growth of facial hair,the development of broader shoulders,and the $cracking$ or deepening of the voice due to the enlargement of the larynx (voice box).While increase in height and weight gain also occur during adolescence,they are general growth patterns and not specific indicators of sexual maturation.Loss of milk teeth is a developmental change associated with childhood,not adolescence.Therefore,the correct option is $B$.

During adolescence,several changes occur in the human body. Mark one change associated with sexual maturation in boys:

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