The hypothalamus is a crucial part of the brain involved in various autonomic and endocrine functions.
Among the listed options:
Homeostasis: The hypothalamus regulates body temperature, hunger, thirst, and other homeostatic processes.
Memory Formation: This function is primarily associated with the hippocampus.
Visual Processing: This is managed by the occipital lobe.
Motor Coordination: The cerebellum and motor cortex are responsible for this function.
Conclusion: Therefore, the primary function of the hypothalamus among the options provided is homeostasis.