The appropriate answer is A. carbohydrates. Carbohydrate is an energy rich substance found in foods such as vegetables, cereal grains and breads. Carbohydrates can be easily broken down to glucose, which is the basic unit or molecule used in the process of cellular respiration.
Foods from animals such as milk, eggs and meat are a rich source of protein. Vitamins are present in all food groups and these are essential in regulating growth and normal body functioning.
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Warmup/stretches probably
We should limit the foods that we eat from the fats, oils and sweet group because these types of food lead to high cholesterol and obesity and obesity and cholesterol may lead to heart attacks.
Hope this Helps!
Advise that you would not take all those pills together and also you should also use some other healthier kind of energy booster maybe like a protein shake instead of resulting to all of those pills.
Medulla which is also part of the brain stem so your answer is brain stem :D<span />