Answer:
B. Black Squirrels have a survival advantage over gray squirrels
Explanation:
Using the information provided, it can be inferred that there is a difference between how many Gray squirrels and how many Black squirrels are being naturally selected. 
This means:
Black squirrels have an advantage that reduces the amount of squirrels being selected from their environment.
Hope this helps!
 
        
                    
             
        
        
        
They have evolved into the best length for their environment. 
        
             
        
        
        
Protons electrons and newtrons
<span>The protons and neutrons are located in the nucleus of the atom</span>
        
                    
             
        
        
        
Baking soda could reduce the acidity from citrus drinks.