Question

which somatic motor control controls reflexes in response to visual and auditory stimuli?

Explanation:

The brain stem (which includes the mesencephalon) and spinal cord are involved in controlling reflexes in response to visual and auditory stimuli. The thalamus is mainly a sensory relay station. The pons and medulla oblongata have other functions like regulating breathing, heart rate etc. The basal nuclei are involved in motor control in a different way (like smooth movement initiation etc.) and hypothalamus is more for homeostasis, endocrine control etc.

Answer:

Brain stem and spinal cord