Fact 1: Decomposition increases amount of organic matter in soil.

Fact 2: Organic matter adds nutrients to the soil.

Given the two facts above, answer the question "What does decomposition increase the amount of in soil?" with the following options: 
- green manures
 - grass seed
 - it needs them
 - bamboo
 - Energy.
 - insects
 - molecules
 - nutrients


 

        nutrients 