Answer the following question given this paragraph: 

One of the simplest machines is the lever, which is a rigid bar pivoted at a fixed place called the fulcrum. Torques are involved in levers, since there is rotation about a pivot point. Distances from the physical pivot of the lever are crucial, and we can obtain a useful expression for the MA in terms of these distances.


Q: One of the simplest machines is the lever, which is a rigid bar pivoted at a fixed place called what?

 Choices:

- caliper

- sling

- wheel

- fulcrum

A:
fulcrum
