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

Fact 2: Bacteria initiate decomposition of plants.

Given the two facts above, answer the question "What would increase the amount of organic matter in soil?" with the following options: 
- coal
 - fossil fuels
 - Pesticides
 - mussels
 - bacteria
 - nutrients
 - burning
 - shrub beds


 

     bacteria    