Coal is an example of.

Explanation:

Mineral or biological material particles deposited on the rock beds and sea beds, forming sedimentary rocks.

These sediments were cemented together to form rocks due to enormous pressure.

Fossil fuels are hydrocarbons that are used as a source of energy.

Coal and gasoline are two examples.

Final answer:

Hence, the correct answer is option B, i.e., sedimentary rocks.