Biomass is the total mass of organisms at a trophic level, and each of the steps in the food chain is a trophic level . Given these facts, biomass is the total mass of organisms at a step in the what among the following options:
- Energy
 - Plants growth
 - food chain
 - agriculture
 - Animal survival
 - Energy.
 - energy usage
 - kinetic energy


 

   food chain      