Q: During adolescence, what causes most of the changes associated with puberty?


Read this paragraph and choose the correct option from the provided answers:

During adolescence, testosterone causes most of the changes associated with puberty. It causes the reproductive organs to mature. It also causes other adult male traits to develop. For example, it causes the voice to deepen and facial hair to start growing.

 Choices:

- estrogen

- nicotine

- methane

- testosterone


A:
testosterone