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It’s a person who studies animals.
biologist
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It’s the substance which very young mammals eat.
milk
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It’s a thing that birds use to fly.
wings
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It’s a place where birds lay their eggs.
nest
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It’s an organ that controls your whole body.
brain
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It’s a mountain with an opening at the top where gases and lava get out.
volcano
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It’s a liquid that flows in your veins.
blood
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