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

Fact 2: Organic matter is important to soil productivity.

Given the two facts above, answer the question "What is important to soil productivity?" with the following options: 
- decomposition
 - genetic material
 - nutrients
 - genetic diversity
 - Enzymes
 - heat energy
 - Quality of life
 - cactuses


 

 decomposition        