These pillars are remnants of layers,most of which have been stripped away by wind erosion.If this occurred in less than five years you might reasonably conclude that:

Question

Quizplus · Accepted Answer

The fact that wind erosion has stripped away most of the layers in less than five years suggests that there has been a significant change in the local climate. The most likely causes of this change are drought or overgrazing, which could lead to increased wind erosion. The other options (volcanic necks, agricultural production, and a lake) do not provide a plausible explanation for the observed phenomenon.

These Pillars Are Remnants of Layers,most of Which Have Been