Fact 1: Mechanical weathering is when rocks are broken down by mechanical means.

Fact 2: Water is a mechanical weathering force.

Given the two facts above, answer the question "What can cause rocks to break down?" with the following options: 
- Wind Barriers
 - Protective Barriers
 - Stone Sealers
 - wind
 - mines
 - Water
 - erosion
 - Gravity


 

      Water   