You are presented with the question "Ice wedging is when water " and the following answer choices: 
- coldest season
 - Metling snow
 - freezes and contracts
 - freezes and melts
 - mouth of rivers
 - In the winter
 - freezes and condenses
 - freezes and expands

Now knowing that ice wedging is when ice causes rocks to crack by expanding in openings and water in the cracks of rocks freeze and expand, choose the best answer.


 

        freezes and expands 