The best definition of a nutrient is a a) food component that enhances one’s health b) essential vitamin or mineral c) food component that performs a physiological function in the body d) food component that can be stored in the body for future energy needs

C) food component that performs a physiological function in the body

Explanation:

A nutrient can be define as a food material or any other substance that is utilized by the body of the organism to perform physiological functions of the body. The nutrient breaks down into sub-parts so as to provide energy to the organism to perform such physiological functions. The physiological functions are necessary for the growth, reproduction and survival of the organisms.

not sure if this is what you'r looking for eubacteria and archaebacteria