Both are forces. Both affect weather. Both form new kinds of rock. Both are forms of weathering.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Tree roots can grow into rock and break it apart. Water can freeze in the cracks of rock, causing it to break apart. How are these two processes alike?
Possibilities:
- Both are forces.
- Both affect weather.
- Both form new kinds of rock.
- Both are forms of weathering.

Both are forms of weathering.