Final answer:
The hypothalamus activates the autonomic nervous system and the endocrine system, both of which are crucial for maintaining homeostasis and regulating involuntary body functions as well as hormone secretion.Therefore, the correct option is c.
Step-by-step explanation:
The hypothalamus activates two critical body systems that are central to maintaining homeostasis: the autonomic nervous system and the endocrine system. These systems are responsible for regulating involuntary body functions and hormone secretion, respectively. The autonomic nervous system has two divisions, the sympathetic division, which is associated with the fight-or-flight response, and the parasympathetic division, which is associated with rest and digest functions. The endocrine system, on the other hand, controls the release of hormones that regulate many aspects of physiology, including growth, development, and metabolism. Together, these systems respond to internal and external stimuli to maintain the body's internal balance and ensure survival.