It adds nutrients to the soil. It helps the soil to dry out. It keeps the soil cool. It destroys bacteria in the soil.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: How does the presence of organic matter contribute to good soil?
Possibilities:
- It adds nutrients to the soil.
- It helps the soil to dry out.
- It keeps the soil cool.
- It destroys bacteria in the soil.

It adds nutrients to the soil.