Answer:
Thats because moon is very near to earth than sun because moon has orbit around the earth. :) 
Brainliest would be appreciated :)) 
 
        
                    
             
        
        
        
Answer:
A closed system is a physical system that does not allow transfer of matter in or out of the system, though, in different contexts, such as physics, chemistry or engineering, the transfer of energy is or is not allowed.