What is the starting material for coal?

A) limestone with abundant shells
B) sandstone formed in certain environments
C) plants
D) black shale
E) any of these

Coal

A combustible black or brownish-black sedimentary rock, formed as rock strata called coal seams, used primarily as a fuel.

Starting Material

The raw substances or components that are used as the basis for a chemical reaction or manufacturing process.

Limestone

A sedimentary rock composed mainly of skeletal fragments of marine organisms such as coral, forams, and mollusks.