character: Mr. Green
topic: Soil Quality and Its Impact on Plants
grade: 9
subject: Biology
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character: Dr. Brown
topic: Nutrient Cycling in Ecosystems
grade: 9
subject: Biology
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character: Ms. White
topic: Photosynthesis and Plant Growth
grade: 9
subject: Biology
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character: Professor Blue
topic: The Role of pH in Soil Quality
grade: 9
subject: Biology
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