If i’m not wrong the main macronutrients are fats carbs and protein, i don’t know if that’s for teens but those are the main macros
        
                    
             
        
        
        
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I think 2. none of the others really sound unstressful
 
        
             
        
        
        
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There are 11 major organ system in the human body,which include the circulatory,respiratory,digestive,excretory,nervous and endocrine system.The immune,integumentary,skeletal,muscle and reproductive system are also part of the human body.
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This is true. Mental health is just as important as physical health.