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carbohydrates
sugar provides energy for the body.
catalyst
Fuel. :)
Nutrients
Fuels
provides energy
Iron
Food provides organisms with necessary nutrients and energy.
It provides the energy necessary for the reaction to occur.
Adenosine Triphosphate (ATP) provides the energy necessary for the activities of all body cells.
Carbohydrates are the nutrients that provides the first source of energy for humans. Nutrients are the nutritious components in foods that an organism utilizes to survive and grow.