The correct statement regarding the similarities between coal and oil is:
Both coal and oil must be mined from underground.
However, it's important to clarify a few other points:
- Both coal and oil are non-renewable fossil fuels, not renewable resources.
- Oil is not mined; it is extracted through drilling. Coal is mined from underground or surface mines.
- Natural gas is a separate fossil fuel that can be derived from oil but is not made directly from coal or oil.
- Coal is a solid, while oil is a liquid, so they are not both gases.
Overall, the mining aspect is the main similarity in the context provided.
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