In studying a food chain, scientists found that herbivores store 10 percent of the energy they obtain from eating green plants. Only this amount of energy is then available to first-level carnivores that prey upon herbivores. First-level carnivores have 10 percent energy available to second-level carnivores; second level carnivores have 10 percent energy available to the next trophic level. Illustrate the trophic levels that are represented in this paragraph. Give specific examples.