Imagine that the size of structures within people's brains grow as skills are developed

If this were true, you can predict that the size of the ________ in a ballerina or gymnast would be larger than normal because of their ability to coordinate bodily movements, control posture, and maintain equilibrium.

a. thalamus
b. cerebellum
c. hippocampus
d. reticular formation

Answer: b. cerebellum