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Their environment was very heterotrophic, meaning there was natural food resources preserved.
en.wikipedia.org Black bears will prey on livestock if their natural food is in poor supply.
en.wikipedia.org After receiving her degree, she worked at various vegetarian and vegan restaurants, and at natural food stores.
en.wikipedia.org The formula was to be diluted in milk and was said to be nearly like the natural food of an infant.
en.wikipedia.org The species takes a wide variety of baits including live and cut fish, squid, octopus, and probably other crustaceans resembling their natural food.
en.wikipedia.org