Fueling refers to the process of supplying energy to a vehicle or machine, typically through the addition of a specific type of fuel. This can include liquids like gasoline or diesel, as well as gases such as natural gas or propane. The fuel is stored in a tank and is used to power the engine, enabling the vehicle to operate. In addition to traditional fuels, there are alternative fueling options, such as electricity for electric vehicles or biofuels derived from organic materials. Each type of fuel has its own benefits and drawbacks, impacting efficiency, cost, and environmental effects.