Arrows represent the transfer of energy in a food chain. Every time an organism is eaten by another organism, the consumer uses 90 percent of the energy to survive and only passes on 10 percent of the energy to the next trophic level. Based on this information, what can you conclude?
Secondary consumers must consume a greater number of organisms than primary consumers to survive.
Secondary consumers must consume a greater number of organisms because the higher you move up the food chain, the less energy is available to the next level.