character: Dolphin Explorer
topic: Echolocation in Dolphins
subject: Geography
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character: Marine Biologist
topic: Habitat of Dolphins and Echolocation
subject: Geography
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character: Ocean Conservationist
topic: Impact of Echolocation on Dolphin Navigation
subject: Geography
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character: Geographer
topic: Mapping Dolphin Migration Patterns Using Echolocation
subject: Geography
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