Question

____ is an inorganic nutrient that the body usually needs in small amounts and serious diseases can occur if the body is lacking one of these.
a vitamin
a protein
a mineral
water

Explanation:

Vitamins are organic. Proteins are organic macromolecules. Water is needed in large - amounts for normal body function. Minerals are inorganic nutrients required in small amounts and deficiencies can lead to serious diseases.

Answer:

C. A mineral