The fuel float is located in the fuel:

The fuel float is a component that is typically found within the fuel tank. Its primary function is to measure the level of fuel in the tank, allowing the vehicle's gauge on the dashboard to accurately display how much fuel is available. The float rises and falls with the level of the fuel, providing real-time feedback to the driver about fuel levels.

In contrast, the fuel filter is responsible for removing impurities from the fuel before it reaches the engine. The fuel pump is responsible for moving fuel from the tank to the engine, and the fuel injector is the component that sprays fuel into the combustion chamber for efficient burning. Each of these components has distinct roles in the fuel delivery system, but the fuel float's specific function is directly tied to the fuel tank itself. Thus, identifying the fuel float's location as being in the fuel tank is essential for understanding its purpose in the vehicle's fuel system.