If the total mass of organisms at a trophic level can be burned in an incinerator to produce energy, then the total mass of organisms at a trophic level can be burned in an incinerator to what?

Answer choices:
- heat energy
 - produce burning
 - produce energy
 - produce sound
 - Electrical energy
 - Greenhouse gases
 - adding heat
 - produce light

 

   produce energy       