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What type of simple machine is a ramp?

  1. Wheel and axle

  2. Lever

  3. Inclined plane

  4. Pulley

The correct answer is: Inclined plane

A ramp is a type of inclined plane, which is a simple machine that reduces the amount of force needed to move an object by increasing the distance over which the force is applied. This is why options A and B (wheel and axle and lever) are incorrect, as they both involve rotating an object rather than using a sloped surface to reduce the amount of force needed. Option D (pulley) is also incorrect, as it involves using a rope or cable to lift an object rather than using a sloped surface to reduce the force needed. Therefore, the best option to describe a ramp would be option C (inclined plane).