Why is so little of earths surface found far above sea levels

Hello! :)

The eroded material finds its way to the bottom of oceans because of gravity (from... According to the hypsometric curve (plot between elevation and % of earth's surface), only about 29% of Earth's surface is above the mean sea level, rest 71% has an elevation less than mean sea level.

Hope this helped and I hope I answered in time!

~ Destiny ^_^

d. organisms have cells with different shapes and functions.