glaciers moving large pieces of a fractured rock tree roots growing in a fractured rock ice freezing on a rock surface wind blowing sand against a rock surface
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which is an example of organic weathering of rocks?
Possibilities:
- glaciers moving large pieces of a fractured rock
- tree roots growing in a fractured rock
- ice freezing on a rock surface
- wind blowing sand against a rock surface

tree roots growing in a fractured rock