Fact 1: Most pituitary hormones control other endocrine glands.

Fact 2: Growth hormone is produced by the pituitary gland.

Given the two facts above, answer the question "what causes growth?" with the following options: 
- bacteria
 - exercise
 - stimuli
 - heat
 - trees
 - cell walls
 - fat
 - hormones


 

        hormones 