Producers, Herbivores, Carnivores, Decomposers, oh my! Help organize the intricacies between these four types of eaters with this biology worksheet. Scientists display nutritional relationships in a graphic organizer. They place 15 terms from the word bank into the 4 categories of the graphic organizer. Terms include concepts such as secondary and primary consumers, photosynthesis, autotrophs, first and second order consumers, etc.