To answer this question, you need to understand the concept of set-point and how it relates to the body's response to a rich meal.
The set-point is a theoretical value that represents the body's ideal weight or physiological state. It is regulated by the hypothalamus in the brain. When the body deviates from the set-point, various physiological responses are triggered to bring the body back to its ideal state.
In the given scenario, a person with a low set-point eats a very rich meal. A rich meal typically provides a large amount of energy in the form of calories. When the body receives an abundance of calories, it needs to expend energy to digest and metabolize the meal. This energy expenditure can lead to an increase in body temperature.
Therefore, the correct answer is:
D. body temperature rises
This option is correct because after consuming a very rich meal, the body may experience an increase in body temperature due to the energy expenditure required for digestion and metabolism.