The cerebellum:
a. maintains alertness and consciousness.
b. aids in balance and control of body movement.
c. plays a vital role in memory and in images of space that help us find our way.
d. is a large bundle of fibers connecting the two cerebral hemispheres.

The correct answer is b.

The cerebellum: aids in balance and control of body movement.

Explanation:

Balance, voluntary muscle movements and coordination are the responsibility of the cerebellum, it is a structure of the central nervous system, which is located at the back and bottom of the skull. The main function of the cerebellum is to integrate motor and sensory pathways. In short, it receives information and orders from the cerebral cortex and connects them with the locomotor system, helping our movements to be uniform and coordinated.