You are presented with the question "What contributes to forming stalactites and stalagmites?" and the following answer choices: 
- Shadows
 - rainfall
 - Bats
 - Columns
 - heat
 - flooding
 - Erosion
 - calcite

Now knowing that erosion causes deposition and deposition landforms also occur forming stalactites and stalagmites , choose the best answer.


 

       Erosion  