What part of the nervous system does the hypothalamus interact with

Autonomic nervous system

Explanation:

The hypothalamus is considered the endocrine gland which with its secretion control the other organs to maintain the balance in the functions of the body.

The hypothalamus mainly controls and maintains the homeostatic mechanisms of the body and regulate the functions which balance the normal functioning in the body like the respiration, heart rate, body temperature, appetite and others.

These processes are regulated by the autonomic branch of the nervous system which is controlled by the secretion of the hypothalamus. Thus, the hypothalamus is the organ which links the nervous system to the endocrine system of the body.

Thus, Autonomic nervous system is the correct answer.