Fact 1: Biomass is the total mass of organisms at a trophic level.

Fact 2: Producers make up the first trophic level, primary consumers the second, and so on.

Given the two facts above, answer the question "What is the total mass of primary consumers" with the following options: 
- Plants
 - animals
 - food
 - Mountains
 - Biomass
 - decreases
 - all matter
 - Weight


 

     Biomass    