What causes the seasons to change? How many hours do elephants spend eating each day? What are the largest creatures that ever lived? Read this book to find out! Part of World Book's Learning Ladders series, this book introduces children to the basic needs of all living things. Each spread includes introductory text, colorful illustrations with detailed captions, and photographs that show real-world examples of the featured topic. Puzzle pages, fun facts, and true/false quizzes appear at the end of each volume.