Your chest may hurt because you might have something going on your body.
You might have a itchy throat or you might be sick.
        
                    
             
        
        
        
C, because vegetables, dairy, juice, and fruit do not have whole grain. Grain is rice, wheat,etc.
        
             
        
        
        
Explanation:
I guess Muscle strength and endurance then there is Cardiovascular Endurance that can help. Flexibility not so much. Body composition helps very much.
Answer:
My final answer would be Body Composition. Nothing else matters that much. In order to swim you need to use to use your body.
 
        
             
        
        
        
hi there again 
your respone to this is really easy
i am a archery person and   i do this all way to 11:00 to 12:00 i meet  people had really bad sportsmanship with bowin and arrows. they will shoot they dont  pay attaio naround their surronding and  one  other person almost got hit by a arrow.  in a postive way that person should've  pay attention to make sure everyone out away and makes sure the person do the 11 steps  to stay safe  and dont get hit by the string when relase the arrow . 
i hope this helps you out 
have a great evening
FaithRawlins14