Which organism cannot produce its own food and must eat other organisms to obtain energy?

Which organism cannot produce its own food and must eat other organisms to obtain energy?

• A. Heterotroph
• B. Consumer
• C. Producer
• D. Decomposer

Answer: (B)

Understanding how energy flows through ecosystems and how organisms obtain energy helps explain why this option fits best. In ecosystems, producers—like plants and algae—make their own food using sunlight. Consumers cannot make their own food and must obtain energy by eating other organisms. This behavior includes herbivores, carnivores, and omnivores, which directly ingest living or recently living tissue to get energy. The broader term for organisms that cannot produce their own food is a heterotroph, which covers any organism that relies on others for energy. But the question’s wording about “eating other organisms” points to a consumer specifically, since decomposers obtain energy by breaking down dead material rather than by eating living organisms. Producers, on the other hand, are the ones that do produce their own food.

Understanding how energy flows through ecosystems and how organisms obtain energy helps explain why this option fits best. In ecosystems, producers—like plants and algae—make their own food using sunlight. Consumers cannot make their own food and must obtain energy by eating other organisms. This behavior includes herbivores, carnivores, and omnivores, which directly ingest living or recently living tissue to get energy.

The broader term for organisms that cannot produce their own food is a heterotroph, which covers any organism that relies on others for energy. But the question’s wording about “eating other organisms” points to a consumer specifically, since decomposers obtain energy by breaking down dead material rather than by eating living organisms. Producers, on the other hand, are the ones that do produce their own food.