Final answer:
The retino-hypothalamic path connects the retina to the hypothalamus to regulate the body's circadian rhythms and sleep/wake cycles.
Step-by-step explanation:
The retino-hypothalamic path is crucial for maintaining the circadian rhythms of the body. This pathway begins with the retina and continues to the suprachiasmatic nucleus (SCN) located in the hypothalamus. The SCN acts as the body's internal clock, regulating the sleep/wake cycle and other daily physiological rhythms by sending signals to the pineal gland. It establishes the regulation of the circadian rhythm based on the presence or absence of daylight. Hence, the retino-hypothalamic path does not deal with auditory processing, visual reflexes, or motor coordination.
c) Regulation of circadian rhythms is the function of the retino-hypothalamic path.