character: Coral
topic: Coral Reefs: Nature's Underwater Cities
grade: 4
subject: Science
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character: Ocean Explorer
topic: The Importance of Coral Reefs for Marine Life
grade: 4
subject: Science
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character: Coral Guardian
topic: How to Protect Coral Reefs
grade: 4
subject: Science
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character: Professor Wave
topic: The Different Types of Coral in Reefs
grade: 4
subject: Science
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