Essential substances found in
minute quantities that regulate the proper functioning of cells

Micronutrient

Explanation:Micronutrients are nutrients that are required in small quantities or trace amount. They aid normal body functioning examples include minerals,vitamins. When micronutrients are in low quantity below critica level the effect can be visible and detrimental. They aid growth and body development,boost immune system. Example include Iron,Zinc,copper,molybdenum.

Micronutrients

Explanation:

Micronutrients are essential substances found in smaller quantities that help in proper functioning of the cells.

These include microminerals or vitamins.

Microminerals or trace elements like iron, chromium, Cobalt, iodine, magnesium, selenium, maganese, zinc e.t.c.

Vitamins like vitamin A, C, D, E, B.

Vitamins are essential for blood clot, immune boosting, energy production and some other functions.

Minerals are essential for body growth, bone formation e.t.c.

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if you listed your answers right then i believe your answer is b.