Fact 1: Earthworm burrows help aerate soil, which is also good for plants.

Fact 2: Aeration quickly changes the chemistry of the soil.

Given the two facts above, answer the question "What do earthworms do to soil?" with the following options: 
- Destroy soil
 - Damages them
 - Exfoliation
 - Converting waste.
 - competing for resources
 - Compact soil
 - Make soil denser
 - Change the chemistry


 

        Change the chemistry 