Fact 1: Moss causes chemical weathering.

Fact 2: Mosses Mosses are flowerless plants that grow in clumps.

Given the two facts above, answer the question "What effects can flowerless plants growing in clumps have on their environment?" with the following options: 
- chemical weathering
 - decreased differentiation
 - Ugliness
 - looseness of dirt or compost
 - Wealth
 - organisms and their habitat
 - Greenhouse gases
 - Al Gore


 

 chemical weathering        