Final answer:
The correct statement about body weight regulation is that the body often responds to reduced calorie intake by raising metabolic rate.
Step-by-step explanation:
The correct statement about body weight regulation is option A, which states that the body often responds to reduced calorie intake by raising metabolic rate.
When calorie intake is reduced, the body tries to compensate for the lack of energy by increasing its metabolic rate. This means that the body burns calories at a higher rate to meet its energy needs.
This response is an adaptive mechanism to ensure that the body can still function properly even with reduced calorie intake.