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

Fact 2: Soil provides nutrients and moisture necessary for plant growth and is fundamental to all life.

Given the two facts above, answer the question "What increases the amount of plant growth and is fundamental to all life?" with the following options: 
- circulatory systems
 - genetic material
 - hurricanes
 - tsunamis
 - genetic diversity
 - decomposition
 - torrential rain
 - organic molecules


 

      decomposition   