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

Fact 2: On Earth, rocks are weathered by wind and water, creating soil and sand.

Given the two facts above, answer the question "Rocks interacting with what over time causes creation of soil and sand?" with the following options: 
- sound
 - light
 - wind
 - river
 - breath
 - stream
 - motion
 - force


 

   wind      