In this food chain case, there are six trophic levels. Which of the following sequences lists the trophic levels from "first" or lowest to “sixth" or highest? a. copepods, herring, phytoplankton, swordfish, mackerel, human b. herring, human, copepods, mackerel, phytoplankton, swordfish c. phytoplankton, copepods, herring, mackerel, swordfish, human

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