Here's a problem to solve: All of the following are examples of erosion EXCEPT:

Among the 4 following options, which is the correct answer?

- A: The wind in the desert blows sand against a rock.
 
- B: A glacier picks up boulders as it moves.
 
- C: A flood washes over a riverbank, and the water carries small soil particles downstream.
 
- D: An icy winter causes the pavement in a road to crack.
 