Wind and rain cause erosion.
Alluvial aquifers are the result of erosion.
Alluvial aquifers are created by wind and rain.
How are alluvial aquifers created?

a: By sand and snow
b: By wind and rain
c: By sunlight and soil
d: By animal activity
e: a hydraulic system
f: Sediment
g: storing water
h: Physical weathering