Fact 1: Moss causes chemical weathering.

Fact 2: If the moss was completely dried then it is dead.

Given the two facts above, answer the question "dryness can do what to chemical weathering" with the following options: 
- break off
 - shrub beds
 - cool off
 - prevent
 - loose soil
 - rock
 - soils
 - improve


 

    prevent     