Fact 1: Aglacier causes mechanical weathering.

Fact 2: Mechanical weathering happens when things like ice physically break rock apart.

Given the two facts above, answer the question "What do glaciers do to rocks?" with the following options: 
- break off
 - Turns them into ice
 - Regrows it
 - Creates more rocks
 - Dries them out
 - protect them
 - Breaks them apart
 - cause their death


 

       Breaks them apart  