character: Dr. Smith
topic: The Importance of Freshwater in Ecosystems
grade: 9
subject: Science
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character: Mrs. Green
topic: The Role of Wetlands in Biodiversity
grade: 9
subject: Science
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character: Mr. Blue
topic: Impact of Pollution on Freshwater Sources
grade: 9
subject: Science
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character: Professor River
topic: Freshwater Systems and Their Functions
grade: 9
subject: Science
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