You are presented with the quiz "Rocks interacting with what over time causes creation of soil and sand?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "rocks interacting with wind over long periods of time causes weathering" and "on Earth, rocks are weathered by wind and water, creating soil and sand". 

So, what's the best answer to the question?


 

   wind        