The correct answer should be carbohydrates.
Carbohydrates are the main source of energy and without them the cells would have no energy at all, which is why they would start working based on reserves of fat, and if you didn't have that you would die of malnutrition.
Muscular Endurance i believe.
Wouldn’t the correct answer be a fad diet?
Answer: You can warmup and extra 5 min or so before intense workouts. That could help to prevent cramps in your body.
Answer: digestive
Explanation: This is where all your nutrients go so it makes the most sense
