Answer:
hypothalamus
Explanation:
The hypothalamus is a very vital part of the brain, which is situated at the base of the brain, and it is connected to the pituitary gland by nervous and chemical pathways. The hypothalamus is responsible for the stimulation of the release of several hormones of the body as well as regulates the activities most autonomic nervous system. Functions such as circadian rhythms, body temperature, behavior, release of hormones, homeostasis are controlled by the hypothalamus.