Question

Why is coal not a mineral?

It does not have a regular composition.
It does not occur naturally.
It is organic.
It is not a solid.

Answer 1

It does not have a regular composition.

Step-by-step explanation:

Answer 2

it is organic

Coal is classed as an organic sedimentary rock and rocks are made from inorganic (not from living) material such as minerals. Coal is made from decomposed plants that are organic (were living)