Which type of simple machine utilizes wheels to facilitate movement and reduce effort?

The answer is indeed wheel and axle, as this simple machine is specifically designed to reduce the effort needed to move objects. A wheel and axle consist of a larger wheel connected to a smaller axle; when force is applied to the wheel, it rotates the axle, thereby making it easier to move heavy loads. This mechanism takes advantage of the mechanical advantage created by the wheel's larger radius, allowing a smaller input force to lift or move a larger load.

In contrast, the other types of simple machines each serve different purposes. A lever operates on the principle of rotational force around a fulcrum, while a pulley uses wheels and a rope or cable to lift loads vertically. The inclined plane helps distribute the weight of an object over a larger distance, making it easier to elevate but not necessarily utilizing wheels. The unique capability of the wheel and axle to facilitate motion through its design makes it particularly effective in reducing effort in moving or lifting items.