Answer:
http://www.realmonstrosities.com/2011/01/dobsonfly.html
Explanation:
It's on the webpage, I hope that works
 
        
             
        
        
        
The earth rotates around its axis as it revolves around the sun. it takes the earth one year to complete a revolution.
        
                    
             
        
        
        
C.
It is d, becuase you divide 500 by 15, and that is the closest answer