After suffering an accidental brain injury, Kira has difficulty walking in a smooth and coordinated manner. She has probably suffered damage to her a. corpus callosum. b. hypothalamus. c. amygdala d. cerebellum.

d. cerebellum.

Explanation:

The cerebellum, which is part of the hindbrain, is a small structure made of a covering of white cortex found under the hemispheres of the cerebral cortex. The cerebellum plays a major role in the control and coordination of all physical movements such as balance, control, etc, that has to deal with smooth and balanced activities of the muscle.

A damage to the cerebellum would most likely lead to impaired motor coordination, staggering, inability to judge distance or when to stop.