compaction erosion faulting weathering
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: In areas where limestone is present underneath the soil, continued rains can alter the limestone formation. The limestone can change to a highly porous formation that can lead to the formation of caves and sinkholes. Which process is directly responsible for changing the limestone?
Possibilities:
- compaction
- erosion
- faulting
- weathering

weathering