What is demonstrated by water moving up a straw?

When water moves up a straw, the power of suction is shown.

Ibelieve the answer is relative humidity  because it makes more sense that way. solar flares usually occur in space it doesn't affect the earth, well it could but it wont make a significant damage.  latitude is land it doesnt do anything. prevailing winds, i dont know the correct meaning for this but i doubt that affects the land so it has to be relative humidity.

Awell breed cat that has no defects or has never been damaged before.hope this ! mark me as brainiest!