Use reasoning to lead to the answer of the following question:
What stimulates the reproductive system to form male organs in growth?\nOptions:\n- (A) Chemical energy\n- (B) barnacles\n- (C) Electrical energy\n- (D) a doorbell\n- (E) sensory neurons\n- (F) peachleaf willow\n- (G) Veins and arteries.\n- (H) male hormones

(H)
Testosterone stimulates the reproductive organs to develop into male organs.

Androgens are male hormones, like testosterone.

Male hormones stimulated the reproductive organs to develop into male organs.

.

Final answer: (H)