Answer: Obvious examples of contrast are black and white, big and small, fast and slow, thick and thin. 
Explanation:
 
        
                    
             
        
        
        
Answer:
false, because we can use apps from mobile.
 
        
             
        
        
        
How to play a string is you take a coin with two fingers and kinda rub it into the strings like your going to do with a blanket. Then, you sing what you are going to sing with the strings. I only know the answer to this one, sorry. :(
I hope I helped you. :)