Final answer:
An autotroph is an organism that can produce its own food using sunlight or inorganic substances.
Step-by-step explanation:
An autotroph is an organism that is able to produce its own food using energy from sunlight (photosynthesis) or from inorganic substances (chemosynthesis).
Out of the given sentences, the one that does not describe an autotroph is a cardinal that feeds on a sunflower. Cardinals are heterotrophs, which means they cannot produce their own food and rely on consuming other organisms for energy.
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