Answer:
b. limit food choices, which reduces energy intake
Explanation:
While on a fad diet you are going to have to cut certain things out like carbs, or gluten, which is limiting food choices, and we need certain foods to provide our bodies with energy, therefore by cutting out certain foods we are taking away or reducing the amount of energy that we could be recieving from the foods we are not eating. (Brainliest pleaseeee)