Minerals are needed for a. water balance and structural systems b. metabolic processes c. functioning of the nervous system d. All of these choices are correct

Answer: Option D). All of these choices are correct

Explanation:

Minerals are inorganic molecules that could be vital to certain life processes. They include the following:

- Calcium, sodium, potassium

All of these plays important role in the opening and closing of ion channels in biological membranes and neurons

- Magnesium, manganese

Which serve as cofactors to many enzymes of metabolic pathways such as glycolysis, electron transport system.

- Calcium, phosphorus

Both serves as important constituent of teeth and bones, which are connective tissues and structure found in the body.

Thus, all of the choices are correct