farmer bob decides to use a compound pulley to raise a box up to the top of his barn.

what is the purpose of using a simple machine in this case?

a) to reduce the amount of friction
b) to reduce the distance the box has to travel
c) to reduce the amount of work needed to lift the box
d) to reduce the amount of force needed to lift the box

D) to reduce the amount of force needed to lift the box

Hope this helps!

The horse latitudes-high-pressure zones about 30 degrees north and 30 degrees south of the equator.-warm air traveling away from the equator cools and sinks-weather tends to be clear and drythe doldrums-low-pressure near equator-air rises and spreads out toward the poles-rising moist air produces clouds and heavy rainthe westerlies-blow from the west-move from the horse latitudes toward the poles.-bring storms across much of the united statesthe tradewinds-blow from the east-move from the horse latitudes toward the equator  -strong, steady winds