Fact 1: Moss causes chemical weathering.

Fact 2: Bryophytes are mosses, liverworts, and hornworts.

Given the two facts above, answer the question "What can cause chemical weathering?" with the following options: 
- bryophytes
 - moonlight
 - cacti
 - global warming
 - calcite
 - viruses
 - ferns
 - friction


 

 bryophytes        