Fact 1: Decomposition increases the amount of nutrients in the soil.

Fact 2: Loams are the best soil type.

Given the two facts above, answer the question "What increase the amount of nutrients in loam?" with the following options: 
- water
 - mussels
 - fire
 - air
 - organic molecules
 - decomposition
 - Enzymes
 - Organic compounds


 

      decomposition   