character: Mr. Patel
topic: The impact of water quality on aquatic life
grade: 10
subject: Biology
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character: Dr. Smith
topic: Effects of pH levels on fish populations
grade: 10
subject: Biology
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character: Ms. Jones
topic: Nutrient pollution and its effects on freshwater ecosystems
grade: 10
subject: Biology
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character: Mr. Lee
topic: The role of dissolved oxygen in aquatic habitats
grade: 10
subject: Biology
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