Answer:
Option D, regulates both reproduction and body temperature
Explanation:
Hypothalamus regulates the internal stability of the body by maintaining homeostasis. It is a small part of the brain that acts as a command center for most of the body functions. Along with this, it also co-ordinates the autonomic nervous system. Just like a thermostat, hypothalamus maintains the body temperature. It also regulates and controls the stimuli and associated responses both internally and externally. Therefore, it is also responsible for regulating the sexual feelings and hence the reproduction
Thus, option D is correct