Fact 1: Most plants grow roots down into the soil to absorb water and minerals.

Fact 2: Fertilizers supplement the roots with nutrients drawn from the soil.

Given the two facts above, answer the question "What does fertilizer supplement?" with the following options: 
- precipitation
 - seeds
 - nutrients
 - vegetation
 - energy
 - bioaerosols
 - rock
 - water


 

   nutrients      