You are presented with the question "What stimulates the reproductive system to form male organs in growth?" and the following answer choices: 
- Chemical energy
 - barnacles
 - Electrical energy
 - a doorbell
 - sensory neurons
 - peachleaf willow
 - Veins and arteries.
 - male hormones

Now knowing that testosterone stimulates the reproductive organs to develop into male organs and androgens are male hormones, like testosterone, choose the best answer.


 

        male hormones 