Fact 1: Ice wedging is when ice causes rocks to crack by expanding in openings.

Fact 2: Freezing water expands cracking and breaking the rocks.

Given the two facts above, answer the question "Ice wedging is when freezing water expands and what?" with the following options: 
- a delta
 - breaks rocks
 - closes schools
 - freezes gas
 - destroys toys
 - erosion
 - solid, liquid, gas
 - near the shoreline


 

  breaks rocks       