The term for organisms that eat primary producers is herbivores. These species primarily consume plants and other photosynthetic organisms that produce their own energy through photosynthesis. Herbivores play a crucial role in the ecosystem by transferring energy from primary producers to higher trophic levels. Examples include animals like cows, deer, and rabbits. Understanding herbivory is essential for studying food webs, ecosystem dynamics, and the ecological interactions between different species within their habitat.