Is the base of good nutrients because it is essential to all forms of metabolism in the body

An essential nutrient is a nutrient that the body cannot synthesize on its own -- or not to an adequate amount -- and must be provided by the diet. These nutrients are necessary for the body to function properly. The six essential nutrients include carbohydrates, protein, fat, vitamins, minerals and water.

so what is your question?

b and c would be the answers