character: Emily Johnson
topic: How Regular Exercise Affects Body Systems
grade: 9
subject: Science
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character: John Smith
topic: Impact of Physical Activity on Cardiovascular Health
grade: 9
subject: Science
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character: Lisa Brown
topic: Muscular System Responses to Regular Exercise
grade: 9
subject: Science
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character: Mark Wilson
topic: Benefits of Exercise on Mental Health and Brain Function
grade: 9
subject: Science
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