Final answer:
The hypothalamus is the part of the brain that signals the endocrine system in response to stress, leading to the release of hormones such as cortisol, epinephrine, and norepinephrine.
Step-by-step explanation:
In response to stress, the hypothalamus is the part of the brain that sends signals to the endocrine system, triggering a series of physiological changes. When a person perceives something as stressful, the sympathetic nervous system prompts the hypothalamus to release corticotropin-releasing factor (CRF), leading to the production of adrenocorticotropic hormone (ACTH) by the anterior pituitary gland. This hormone then stimulates the adrenal glands to secrete cortisol and other stress-related hormones. Additionally, the hypothalamus directly controls the sympathetic nervous system's influence on the adrenal medulla, causing it to release epinephrine and norepinephrine during short-term stress responses.
The correct answer to the question is (c) hypothalamus.