Final answer:
The hypothalamus is responsible for controlling the ANS and endocrine system, managing body temperature, thirst, and water balance, as well as regulating sleep cycles and various involuntary body processes.
Step-by-step explanation:
The location that controls the autonomic nervous system (ANS) and the endocrine system along with functions such as body temperature, thirst, and water balance is the hypothalamus. The hypothalamus is a crucial part of the forebrain situated just below the thalamus. It sends signals to the pituitary gland which, in turn, influences other endocrine glands and various bodily functions. Moreover, the hypothalamus acts as the body's thermostat, ensuring that body temperature is maintained at appropriate levels. It also plays a significant role in regulating circadian rhythms or sleep cycles. The ANS, responsible for involuntary control and homeostasis, is also influenced by the hypothalamus in its role to manage the body's various autonomous processes like heartbeat, digestion, and sweating.