You are presented with the question "What is the total mass of primary consumers" and the following answer choices: 
- Plants
 - animals
 - food
 - Mountains
 - Biomass
 - decreases
 - all matter
 - Weight

Now knowing that biomass is the total mass of organisms at a trophic level and producers make up the first trophic level, primary consumers the second, and so on, choose the best answer.


 

     Biomass    