character: Ecosystem Engineer
topic: Role of chemical interactions in maintaining ecosystem balance
grade: 9
subject: Chemistry
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character: Chemical Reaction Specialist
topic: Types of chemical reactions in ecosystems
grade: 9
subject: Chemistry
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character: Aquatic Chemist
topic: Impact of chemical interactions in aquatic ecosystems
grade: 9
subject: Chemistry
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character: Soil Scientist
topic: Chemical interactions in soil ecosystems
grade: 9
subject: Chemistry
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