1 : Canadian Shield - tundra. 
This means that it's characterized by low temperatures which stop and limit plant growth. It's similar to the desert, except it has more precipitation
 2 : Alaskan plains - subarctic
Due to its closeness to the arctic. 
3 : Seattle, Washington - Marine west coast (West Coast of the Pacific Ocean - the closeness of the ocean has a determining influence on the climate)
 4 : Washington, D.C. humid continental climate, with mild but wet winters
 
        
                    
             
        
        
        
<span>maintaining a stable internal environment</span>
        
             
        
        
        
Answer:
I believe I have had this question this before. The correct answer should be rr, BB. 
 
        
                    
             
        
        
        
She has been eating creating additional atoms creating more mass and mass is the same as wen it was consumed