You are presented with the question "What effects can flowerless plants growing in clumps have on their environment?" and the following answer choices: 
- chemical weathering
 - decreased differentiation
 - Ugliness
 - looseness of dirt or compost
 - Wealth
 - organisms and their habitat
 - Greenhouse gases
 - Al Gore

Now knowing that moss causes chemical weathering and mosses Mosses are flowerless plants that grow in clumps, choose the best answer.


 

 chemical weathering        