You are presented with the question "How does water crack rocks?" and the following answer choices: 
- Turning to silt
 - bottom of feet
 - Turning to ice
 - Getting hot
 - erosion
 - Mixing with salt
 - lowered energy cost
 - Movement

Now knowing that ice wedging is when ice causes rocks to crack by expanding in openings and water expands as it freezes into ice, choose the best answer.


 

   Turning to ice      