Answer:
Well too bad, I did use google, and I got the answer C) the law of lever and balance.
Step-by-step explanation:
This is the law of the lever, which was proven by Archimedes using geometric reasoning. It shows that if the distance a from the fulcrum to where the input force is applied (point A) is greater than the distance b from fulcrum to where the output force is applied (point B), then the lever amplifies the input force.