Final answer:
Organisms that eat other organisms for food are called consumers or heterotrophs, including humans who are classified as omnivores because they eat both plants and animals.
Step-by-step explanation:
The organisms that eat other organisms for energy and nutrients are known as consumers or heterotrophs. These organisms cannot produce their own food through photosynthesis, so they must ingest or absorb it from other sources. Consumers include all animals, fungi, many protists, bacteria, and even a few plants. Herbivores consume plants, carnivores consume animals, and omnivores eat a combination of both plants and animals. Humans fall into the omnivore category as we eat fruits, vegetables, grains, meat, and dairy products.