What causes alteration of plant debris that make coal?
fine debris emitted as a byproduct of coal combustion. coal, oil, or natural gas. Fossil fuels formed from the remains of ancient plants and animals. device used for heating by burning a fuel, such as wood or coal.
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-look at the obvious
-analyze the artwork
-decide on an interpretation
-make a judgement call
The answer is B. all the others are formed by deposition