character: Mr. David Smith
topic: Exercise and Its Effect on Bone Density
grade: 9
subject: Science
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character: Dr. Jane Doe
topic: Impact of Weight-Bearing Exercises on Bone Health
grade: 9
subject: Science
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character: Coach Mike Johnson
topic: Role of Physical Activity in Strengthening Bones
grade: 9
subject: Science
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character: Professor Emily Carter
topic: Nutrition and Exercise: A Dual Approach to Improving Bone Density
grade: 9
subject: Science
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