Final answer:
An autotroph is an organism that uses sunlight to make food through the process of photosynthesis.
Step-by-step explanation:
An organism that uses the sun's energy to make food is called a(n) autotroph. Autotrophs are able to carry out photosynthesis, a process in which they convert sunlight into chemical energy to produce their own food. Plants, algae, and some bacteria are examples of autotrophs. They contain a pigment called chlorophyll that captures sunlight and allows them to carry out photosynthesis.
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