Answer:
It is made of organic material.
Step-by-step explanation:
Coal is not classified as a mineral because it is made up of organic material.
It is source of many organic materials. It is fossil fuel and form after long period decay of plants. It is formed when trees are buried under earth about 500 million years ago. The chemical and bacterial reactions take place and plant wood converted into the peat.
Than because of high temperature and pressure inside the earth peat is converted into the coal.
Through other processes it is than used to make the fuels such as coke. coal tar and coal gas.
Coal tar is the source of many organic compounds which are separated through fractional distillation.
About 80% of coal in Pakistan is used to bake the bricks and also used in lime kilns and for domestic purpose.