Subjects: Food chains (Ecology)--Juvenile literatureJUVENILE NONFICTION / Science & Nature / Environmental Science & Ecosystems; JUVENILE NONFICTION / Poetry / General
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Subjects: Water--Juvenile literatureJUVENILE NONFICTION / Science & Nature / Earth Sciences / Water (Oceans, Lakes, etc.); JUVENILE NONFICTION / Science & Nature / Environmental Conservation & Protection