character: Dr. Lee
topic: Biological Influences on Erosion and Sedimentation
grade: 9
subject: Science
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character: Professor Smith
topic: Impact of Vegetation on Soil Stability
grade: 9
subject: Science
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character: Dr. Patel
topic: Role of Aquatic Plants in River Sediment Dynamics
grade: 9
subject: Science
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character: Ms. Johnson
topic: Influence of Animal Activities on Soil Erosion
grade: 9
subject: Science
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