Question

which of the following best describes peat? an early stage of coal formation an unnatural flammable gas a liquid form of fossil fuel a decayed inorganic material

Explanation:

Peat is formed from partially decomposed plant material in waterlogged conditions. It is the first stage in the formation of coal. Over time, with increased pressure and temperature, peat undergoes further transformation to become lignite (brown coal), then bituminous coal, and finally anthracite.

• "an unnatural flammable gas": Peat is a solid, not a gas. Flammable gases like methane can be associated with coal - mining (e.g., firedamp), but that's not what peat is.
• "a liquid form of fossil fuel": Liquid fossil fuels are like petroleum. Peat is a solid, fibrous material.
• "a decayed inorganic material": Peat is formed from organic (plant - based) material, not inorganic.

Answer:

an early stage of coal formation