The answer is interval.
I do have some experience, I'm a pianist and singer.
        
                    
             
        
        
        
Music, design, and drama have all played important roles in the evolution of dance, and in many cultures dance has actually been inseparable from these arts. The Greek word mousikē, for example, referring to music, poetry, and dance as one form, reflected the integral relation between these three arts in classical Greek drama. In the early European ballets, dance, music, drama, and spectacle were equally inseparable.
        
             
        
        
        
Answer:
The answer is both. Despite most of Duchamp's work was a sort of spoof (including "N*ude Descending a Staircase"), the consequences of his trajectory represent a critical watershed in the History of Art.
 
        
             
        
        
        
The answer is
Going to b either b or c. Most likely c
        
                    
             
        
        
        
He only started painting when he was 27 years old. 
His life is documented on the letters he has wrote. 
Before declaring he was an artist, he attempted many other careers. 
For most of his life he had a mental illness. 
He cut off his own ear.