The 20 minute physical activity I performed was doing yardwork. It was fairly easy to do, besides a lot of bending down involved to pick up sticks. I did it in my front and backyard for a bit over 20 minutes, and no one did it with me.
 
        
                    
             
        
        
        
Answer:
2 a sensory organ starches 
 
        
             
        
        
        
Answer:
its the measure of your body's ability to take oxygen from the atmosphere and use it to produce energy for your muscle cells. 
Explanation: