Answer:
Your answer would be D.
They are defined by their different physical features.
hope it helps!
 
        
                    
             
        
        
        
The kilometer is the independent, since it stays the same, and the increasing his exercise time is the dependent since that’s what’s changing
        
             
        
        
        
TRUEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
        
                    
             
        
        
        
A <span>coelacanths lived long ago and it is actually a sea creature pretty much like a Dino, But its extinct now. Hope this helps :)</span>