their vocal cords stretch as they age, such as when one goes through puberty
Puberty.
Yes, voice changes are common during teenage years as the larynx grows and vocal cords lengthen. This can result in a deeper voice for boys and sometimes a higher or more variable voice for girls. These changes are influenced by hormones and are a normal part of puberty.
When a boy begins puberty, his voice will lower. There is no significant difference or change in voice for girls.
The testosterone produced in the testicles are what cause the voice to change during puberty.
It happens by itself during puberty. For you at your age it will be soon. There is nothing to help a voice change in tone.
Everybody's voice changes because of puberty. Puberty does a lot of things to your body that you WILL notice like voice changes. Your voice will become more deeper.
You have to wait... It will happen eventually although it is not unknown for it to happen this early in Puberty. It is normal for a boy of your age to have a higher voice than older boys. Puberty will cause your voice to lower, but it can take a few years.
Have bumps,voice change.
To answer your question, yes, some girl's voices do break. Whilst going through puberty, girl's voices change in tone, causing some to 'break'. This is not, however, as dramatic and obvious as in males. Voices change because the larynx, or voice box, increases in size during puberty. When the larynx grows very quickly, it can cause the voice to 'break', crack, and squeak. As the vocal cords in the larynx get thicker and longer, the tone of the voice deepens.
Puberty goes on until age 18-20 and does not grow after puberty. It will change because of age but not grow.
When it starts cracking(squeaking).