The correct answer is: C. Biodiesel.
Explanation:
1. Diesel and gas are fossil fuels derived from petroleum.
2. Coal is also a fossil fuel formed from the remains of plants and trees over millions of years.
3. Biodiesel, on the other hand, is a renewable fuel source made from biological materials like vegetable oils or animal fats, not from fossil sources.
Therefore, biodiesel is not a fossil fuel because it is derived from renewable resources rather than ancient organic matter like diesel, gas, and coal.
