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

Fact 2: Organic matter is the byproduct of the decomposition.

Given the two facts above, answer the question "what does decomposing increase?" with the following options: 
- fossils
 - Motility
 - prolactin release
 - oil
 - organic matter
 - aerobic capacity
 - Energy.
 - water


 

     organic matter    