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Option B is incorrect. Animals are able to move, as opposed to fungi and plants. Option C is incorrect. All animal cells are eukaryotic. Option D is incorrect. Animal cells do not have cell walls, which are characteristic of fungi and plants. Option A is correct. Animals are heterotrophic, meaning they cannot make their own food. Some prokaryotes, some protists, and plants are autotrophic, which means that they can make their own food from inorganic substances they take in from their environments.