by adding carbon by adding nitrogen by removing excess water by removing excess minerals
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Decomposers increase the fertility of the soil and prevent dead organisms from building up in the environment. In which way do decomposers make the soil more fertile?
Possibilities:
- by adding carbon
- by adding nitrogen
- by removing excess water
- by removing excess minerals

by adding nitrogen