The term for an organism that gets energy from consuming others is a heterotroph. Heterotrophs are unable to produce their own food through photosynthesis or chemosynthesis, relying instead on obtaining energy and nutrients by consuming organic matter, such as plants, animals, or decomposed material. This category includes various organisms, such as herbivores, carnivores, omnivores, and detritivores. Heterotrophs play a crucial role in ecosystems as they contribute to the food web, connecting different trophic levels and facilitating energy transfer within biological communities.