Final answer:
The main difference between an autotroph and a heterotroph is how they obtain energy. Autotrophs can produce their own food through photosynthesis, whereas heterotrophs rely on consuming organic compounds from other organisms for energy.
Step-by-step explanation:
The main difference between an autotroph and a heterotroph is how they obtain energy. Autotrophs are organisms that can produce their own food, usually through the process of photosynthesis, using sunlight and carbon dioxide. Examples of autotrophs include plants and algae. Heterotrophs, on the other hand, cannot produce their own food and rely on consuming organic compounds from other organisms for energy. Humans and animals are examples of heterotrophs.
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