character: Mr. Lee
topic: Effects of Erosion on River Landscapes
grade: 9
subject: Geography
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character: Mr. Tran
topic: Impact of Human Activity on Erosion in River Valleys
grade: 9
subject: Geography
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character: Ms. Johnson
topic: Sediment Transport and River Morphology
grade: 9
subject: Geography
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character: Dr. Smith
topic: Erosion Control Techniques in River Management
grade: 9
subject: Geography
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