You are presented with the question "What do earthworms do to soil?" and the following answer choices: 
- Destroy soil
 - Damages them
 - Exfoliation
 - Converting waste.
 - competing for resources
 - Compact soil
 - Make soil denser
 - Change the chemistry

Now knowing that earthworm burrows help aerate soil, which is also good for plants and aeration quickly changes the chemistry of the soil, choose the best answer.


 

        Change the chemistry 