FUELS is a broad term that can refer to many different types of energy sources. FEEDS, COKES, PEATS, and STOKES are all examples of fuels. FEEDS is a type of fuel made from animal fats and vegetable oils, while COKES is a type of fuel made from coal. PEATS is a type of fuel made from partially decayed vegetation, and STOKES is a type of fuel made from wood or other combustible materials. All of these fuels are used to generate heat and power.