The natural process that the illustration models would be erosion.
Erosion
Is a process by which the topmost soil of an area gets removed.
Erosion of topmost soils can be removed by water or by the wind.
When erosion is caused by water, it is called water erosion. If it is by wind, it is called wind erosion.
Thus, the blowing away of flour on a tray filled with flour by a fan is a way of demonstrating how wind erosion of soils works.
More on erosions can be found here: https://brainly.com/question/3852201
