Explanation:

Option 4 is correct : A naturally occurring substance that has a definite chemical composition is a mineral. Minerals are not evenly distributed over space. They are concentrated in a particular area or rock formations. Some minerals are found in areas which are not easily accessible such as the Arctic ocean bed and Antarctica. Minerals can be both metallic and non-metallic. Example - Copper and Aluminium are metallic minerals whereas Calcium and Potassium are non-metallic minerals.

Minerals are formed in different types of geological environments, under varying conditions. They are created by natural processes without any human interference. They can be identified on the basis of their physical properties such as colour, density, hardness and chemical properties such as solubility.