D westerlies 
Because the west wind of flowing well west
        
                    
             
        
        
        
Well, depending on how long the migration is, many of the animals (mainly birds) could get sick and die, lowering the population. They could be shot by hunters, lowering the population. The children of the population could get left behind and lose their way, lowering the population. I'm not entirely sure how the population could grow other than them finding and staying with another group of their own kind. hope I was helpful! :)
        
             
        
        
        
Answer:
 negative feedback loop involving insulin and glucagon help to keep blood glucose levels within a narrow concentration range. If glucose levels get too high, the body releases insulin into the bloodstream.
hope it help
 
        
             
        
        
        
Answer: Cup 2 
Explanation: The color changed because the things around us and because I did the experiment to. Hope I Helped :p