Question

How are coal types classified?

color and texture
carbon content and heat value
depth from the surface
sulfur content

Answer 1

I believe its B...."Carbon Content and Heat Value"

Step-by-step explanation:

Coal is classified into four main types, or ranks: anthracite, bituminous, subbituminous, and lignite. The ranking depends on the types and amounts of carbon the coal contains and on the amount of heat energy the coal can produce.

Answer 2

It’s carbon and it’s heat value