Question

which grow when they become adult to boys​

Answer 1

First, your testicles and penis begin to grow bigger.

Your body shape may start to change as more muscle tissue forms.

You will become taller, develop more muscles and your shoulders will get broader.

On average boys grow nearly inches (9.5 cm) per year during this growth spurt.

There is also voice change at the stage of puberty.

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Answer 2

Answer:

i know it's not related to school books......

1. but facial hair appear .
2. hair in private area starts
3. penis errection sometimes
4. voice gets change due to voice box
5. semen can be produced
6. height increase
7. sometimes feel attachment to opposite gender