The model of graphing the "fall in sea level" with the "rise in sea level" can be used to "predict how changes in sea level" shape the Earth.
Explanation:
The cycle of rise and fall in the sea level repeats every fifteen days owing to the increase and decrease in the gravitational pull by the moon.
When the sea level increases, the coasts and lowlands submerge under the water and when the sea level decreases, more than what had submerged is exposed, thus changing the shape of the Earth.
