lever pulley inclined plane wheel and axle
I gave my students this multiple choice question: Scientists wonder how the Egyptian pyramids were built. They think that the huge blocks of stone may have been put into place by pushing them up a sloping pathway. The pathway is which type of simple machine?

Only one answer is correct among these 4 choices:
- lever
- pulley
- inclined plane
- wheel and axle

Could you tell me which one is correct?

inclined plane