Fact 1: When water freezes , that water expands.

Fact 2: Water in the rocks pushes out when it freezes thus causing the rocks to break.

Given the two facts above, answer the question "What does frozen water break?" with the following options: 
- lake
 - ice
 - crust
 - sky
 - rivers
 - nektar
 - Weight
 - rock


 

        rock 