Which region supplies coal in abundance to the rest of the state

Prairie plains

Explanation:

Prairie plains are open environments that differ greatly from each other: the steppes of western Siberia, the great plains of North America, the savannas of India and Africa, the pampas of South America, the cerrados of Brazil, and even forested areas that have been cleared for agriculture or grazing.

All of these fields are covered with grass and other plants adapted to irregular rainfall, such as in Europe and North America. In North America, even, prairie plains are the regions that supply large amounts of coal to the entire state.

The Appalachian Mountains (Appalachian region) supplies over 79% of coal which makes it the largest region to supply coal. The Appalachian region is West Virginia.