dew evaporating on the rock leaves decaying on the rock snow melting in a crack in the rock water freezing in a crack in the rock
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which of the following is most likely to make a rock crack and crumble?
Possibilities:
- dew evaporating on the rock
- leaves decaying on the rock
- snow melting in a crack in the rock
- water freezing in a crack in the rock

water freezing in a crack in the rock