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 can cause chemical weathering?" with the following options: 
- Calcium carbonate
 - our nearest star
 - global warming
 - sea squirts
 - swamp vegetation
 - single-celled organisms
 - flowerless plants
 - Earthworms


 

       flowerless plants  