You are presented with the question "What increases the amount of plant and animal residue in soil?" and the following answer choices: 
- Decomposition
 - Warm temperatures
 - fossil fuels
 - Pesticides
 - nutrients
 - evaporation
 - Wet weather
 - Living creatures

Now knowing that decomposition increases amount of organic matter in soil and organic matter is the plant and animal residue in the soil at various stages of decomposition, choose the best answer.


 

 Decomposition        