Question

what happens to most of the energy at each trophic level?
it is stored as biomass
it is converted back to light
it is passed to the next level
it is lost as heat

Explanation:

In an ecosystem's trophic levels, energy transfer is not 100% efficient. Organisms use energy for metabolic processes like respiration. As a result, most of the energy is lost as heat to the environment during these processes.

Answer:

It is lost as heat