Question

the right side of the dropdown controls the left side of the body. the dropdown contains options: spinal cord, cerebellum, cerebrum (with cerebellum highlighted).

Explanation:

The cerebrum has a contralateral control, meaning the right side of the cerebrum controls the left side of the body. The spinal cord and cerebellum do not have this specific contralateral motor control pattern for body sides as the cerebrum does.

Answer:

cerebrum