Which type of fuel is derived from living matter?

Biofuel is derived from living matter, which includes organic materials such as plants and animal waste. These fuels are produced through biological processes and harness the energy stored in the material during the life of the organisms.

The production of biofuels often involves using renewable resources like crops (for example, corn or sugarcane for ethanol) or waste products, and it is considered a sustainable energy source due to its ability to be replenished over a short period.

In contrast, fossil fuels, nuclear fuel, and natural gas are not derived from current living organisms. Fossil fuels are the remains of ancient plants and animals that have been transformed over millions of years, while nuclear fuel typically refers to materials like uranium that are mined from the Earth. Natural gas, while it can be associated with fossil fuels, is also formed from the decomposition of organic matter over geological timescales.