Question: In an ecosystem, not all of the energy that is available is used by the organisms. Some energy becomes unavailable before it can be transferred to organisms in the next trophic level. How does the energy most likely become unavailable?

  Options: 
 A. The energy is stored as food.
 B. The energy is dissipated as heat.
 C. The energy is trapped in dead organisms.
 D. The energy is moved to another ecosystem.
Answer: B