It is A! He used a atmospheric perspective.
 
        
                    
             
        
        
        
X+3y=-4                                  x+3y=-4]
y+x=0    ]multiply minus===> -y-x=0  ]===elimination x===>2y=-4  ==>y=-2 x=2
                   (-)
                                                           
        
             
        
        
        
Answer:
B. Buzz
Explanation:
The escaping air meets resistance from the lip muscles, which forms a
hole called the
and creates the vibration that brass players call
the buzz.
 
        
             
        
        
        
Wow that is a really good picture!!! Did you make it yourself???