Here's why:
* Biological weathering involves the breakdown of rocks by living organisms. Mosses and lichens are organisms that can grow on rocks.
* How they break down rocks:
* Lichens produce weak acids that dissolve the rock's surface.
* Mosses can trap moisture and create a more acidic environment, aiding in the breakdown of the rock.
* Roots of plants can also grow into cracks in rocks, causing them to widen and eventually break.
Let me know if you have any other questions about weathering!
