Question

formation of coal...........​

Answer 1

Answer:

Coal is formed when dead plant matter decays into peat and is converted into coal by the heat and pressure of deep burial over millions of years.

Answer 2

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Coal was formed some 300 million years ago, when trees and plants in the forests got buried under the earth's surface as a result of earthquakes, cyclones, and other natural disasters. There are hot conditions, absence of air; as a result hydrogen and oxygen were removed from wood, leaving behind carbon. Due to high temperature and high pressure, the carbon changed into a stone-like residue called coal.

This slow process of changing of wood into coal by numerous heating and pressure inside the earth's surface is called carbonisation.