Fact 1: Rocks interacting with wind over long periods of time causes weathering.

Fact 2: Weathered rock is called saprolite .

Given the two facts above, answer the question "Saprolite is created when what interacts with wind over long periods of time?" with the following options: 
- soils
 - trees
 - rocks
 - water
 - erosion
 - calcite
 - heat
 - oil


 

   rocks      