You are presented with the question "What is it called when rocks are broken down mechanically?" and the following answer choices: 
- mines
 - dangerous
 - coral reef
 - cracking
 - tube
 - loose soil
 - calcite
 - erosion

Now knowing that mechanical weathering is when rocks are broken down by mechanical means and erosion begins with the weathering, or breaking down, of rocks and soil, choose the best answer.


 

        erosion 