Which of the following most accurately describes the process involved in the formation of coal?
Coal is formed in areas that were once deserts 350-400 million years ago. It's the result of a reaction between desert plants and animal remains and the sand in which they become buried.
350-400 million years ago, plants that captured energy from the sun during photosynthesis were buried in swamps. Coal eventually formed from these plant remains as they are buried in layers of sediment.
A few hundred years ago, trees in deciduous forests died and were covered in layers of soil. These remains eventually formed coal.
Coal was formed in areas that were once covered in ice. Layers of soil piled on top of the ice and eventually formed coal.
Coal formation occurs fairly randomly. There's no way to know what the area was like before or predict where coal might form.