Question

question 1-57
what is one of the purposes of a simple machine?
uses complicated technology to get the job done
causes work to be harder
needs no human
reduces the effort needed to move a load

Explanation:

Simple machines like levers, pulleys, etc. are designed to make work easier by reducing the force (effort) required to move a load over a distance. They don't use complicated technology, don't make work harder, and usually still require human input.

Answer:

reduces the effort needed to move a load