Please answer the following question: Fact 1: Testosterone stimulates the reproductive organs to develop into male organs. Fact 2: Androgens are male hormones, like testosterone. Given the two facts above, answer the question "What stimulates the reproductive system to form male organs in growth?" with the following options: - Chemical energy - barnacles - Electrical energy - a doorbell - sensory neurons - peachleaf willow - Veins and arteries. - male hormones
A:
male hormones