Fact 1: Moss causes chemical weathering.

Fact 2: Chemical weathering is the chemical disintigration of rocks.

Given the two facts above, answer the question "Moss can cause the breakdown of what?" with the following options: 
- water
 - mushrooms
 - Limbs
 - rocks
 - cactus
 - tissue
 - biome
 - Engine


 

    rocks     