Here's why:
* Metamorphic Rock: Coal is formed from the transformation of organic matter (like ancient plants) under intense heat and pressure deep within the Earth. This process changes the original material, making it a metamorphic rock.
* Used as Fuel: Coal is a fossil fuel and has been a major source of energy for centuries due to its high carbon content.
Important Note: While coal is technically a metamorphic rock, its origin and primary use make it more accurately categorized as a fossil fuel.
