These pillars are remnants of layers,most of which have been stripped away by wind erosion.If this occurred in less than 5 years you might reasonably conclude that
A)the pillars are remnants of volcanic necks.
B)this area recently has become a productive place to produce agriculture.
C)there must have been drought,overgrazing,or some short-term climatic change.
D)this area was originally a lake.

Question

These pillars are remnants of layers,most of which have been stripped away by wind erosion.If this occurred in less than 5 years you might reasonably conclude that 
A)the pillars are remnants of volcanic necks. 
B)this area recently has become a productive place to produce agriculture. 
C)there must have been drought,overgrazing,or some short-term climatic change. 
D)this area was originally a lake.

Quizplus · Accepted Answer

The fact that wind erosion has stripped away most of the layers implies that there has been significant exposure of the pillars to the elements. If this erosion occurred in less than 5 years, it suggests that there was a sudden, short-term change in the environment that caused the erosion. Drought, overgrazing, or some other climatic change that caused increased wind activity would be a likely explanation for this erosion. The other choices are not supported by the evidence given.

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