Answer:
A-Stretched image that when viewed at an angle, becomes clear.
Explanation:
From what I’ve learned, it is a distorted image that becomes clear when it is viewed from an angle. 
 
        
             
        
        
        
Jazz became very popular in 1920s because of upbeats sound in his music
        
                    
             
        
        
        
Answer:
A piano lol 
Explanation:
I had to answer the same question in music
 
        
                    
             
        
        
        
Answer:
To improve your singing and your tone, it's a great idea to practice both your head voice and your chest voice, and be able to recognize when each is best to use low and mid-range notes are often more comfortably sung in chest voice, while high notes require the use of your head voice.
Explanation: