A function of carbohydrates in the diet is to: enable chemical reactions. promote growth and repair of tissues. supply energy. maintain water balance.

Supply Energy

Explanation:

Carbohydrates, or saccharides, comes under biomolecules. The four significant classes of biomolecules are nucleotides, lipids, proteins and carbohydartes. Among these carbohydrates is more abundant.  It is also called "carbs," carbohydrates have a few jobs in living life forms, including energy transportation. They are the structural parts of insects and plants. Carbohydrates derivatives are engaged with blood clotting, the immune system, the reproduction, the development of disease.

D. all of the above

Explanation:

each and everything stated benefit the plant, thus making soil important to plants.