Question

a seesaw is an example of which type of simple machine?
pulley
inclined plane
lever
screw

Explanation:

A seesaw works by having a fulcrum (the pivot point) and two ends where force (weight) is applied. A lever is a simple machine consisting of a beam or rigid rod pivoted at a fixed hinge (fulcrum), which matches the seesaw's mechanism. A pulley uses a wheel and rope, an inclined plane is a sloped surface, and a screw is a helical inclined plane—none of these match the seesaw's design.

Answer:

C. Lever