You are presented with the question "What do rivers do to rocks?" and the following answer choices: 
- storing water
 - to move people
 - they bend
 - Make them get bigger
 - It has no effect on rocks
 - Polish them
 - Turn it to soil
 - protect them

Now knowing that soil is formed by rocks eroding and rivers erode the rocks they flow over, choose the best answer.


 

       Turn it to soil  