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 "Fungi increase the amount of what in soil" with the following options: 
- one celled organisms
 - organic matter
 - Energy.
 - roots
 - genetic diversity
 - metals
 - Organic compounds
 - air


 

  organic matter       