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

Fact 2: Fungi are involved in decomposition, as well.

Given the two facts above, answer the question "What can help increase the amount of organic matter in soil? " with the following options: 
- Fungi
 - mussels
 - pine
 - worms
 - animals
 - Enzymes
 - solutes
 - trees


 

 Fungi        