You are presented with the question "How are alluvial aquifers created?" and the following answer choices: 
- By sand and snow
 - By wind and rain
 - By sunlight and soil
 - By animal activity
 - a hydraulic system
 - Sediment
 - storing water
 - Physical weathering

Now knowing that wind and rain cause erosion and alluvial aquifers are the result of erosion, choose the best answer.


 

  By wind and rain       