Fact 1: Decomposition increases the amount of nutrients in the soil.

Fact 2: Plants grow in nutrient rich soil and absorb the nutrients.

Given the two facts above, answer the question "What does decomposition do?" with the following options: 
- heat the body
 - it helps plants in growing
 - duplicate itself
 - rapid expansion
 - heat production
 - heat is produced
 - it keeps an organism warm
 - Cell division


 

  it helps plants in growing       