Minerals are naturally occurring, solid, inorganic substances with a definite chemical composition and a crystalline structure. Minerals are the basic building blocks of rocks.

Which of these is a mineral?

A) Water

B) Salt

C) Sand

D) Carbon dioxide

The correct answer is B) Salt. Salt is a mineral composed primarily of sodium chloride (NaCl). It is found in abundance in seawater and salt mines and is essential for various biological processes.