Fuel

Fuel is what makes things go, like gasoline in a car or wood in a fire. It's kind of like food for machines and vehicles. Just like how we need food to have energy, machines need fuel to work. Fuel can be made from different things like oil, wood, or even the sun. When we put fuel in a machine, it can turn into energy that makes the machine move, like how gas makes a car go. But we have to be careful with fuel because some kinds can be dangerous or bad for the environment.