What changes occur in the voice of boy’s at the onset of puberty?
At puberty the voice of the boys starts deepening and may become hoarse temporarily.
What happens to voice box at puberty?
Puberty results in the growth of the voice box or the larynx. Boys develop larger voice
boxes which can be seen as a protrudung part of the throat, it is called Adam's apple. The voice box is small in girls and is hardly visible
What are those characters called, which distinguish a boy from a girl?
Secondary sexual characters.