Fact 1: Sex hormones are chemical messengers that control sexual development and reproduction.

Fact 2: Androgens are male sex hormones.

Given the two facts above, answer the question "What are chemical messengers?" with the following options: 
- Acids
 - photons
 - androgens
 - basic
 - metal
 - Life forms
 - nerves
 - glucose


 

   androgens      