character: Echo
topic: How Dolphins Use Echolocation to Find Food
grade: 4
subject: Science
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character: Dolphin
topic: Understanding Echolocation in Marine Animals
grade: 4
subject: Science
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character: Ocean Explorer
topic: The Role of Sound in Underwater Navigation
grade: 4
subject: Science
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character: Marine Biologist
topic: Dolphins: Masters of Communication and Hunt
grade: 4
subject: Science
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