D... i took science last year
        
             
        
        
        
Answer: Enlarged brain because this is how i found it it was on quizlet
Explanation:
 
        
             
        
        
        
C is the answer ik a lot of science
        
                    
             
        
        
        
Lasting genetic similarities make the two bears biological sister species, more closely related to one another than to any others. ... But Ursus maritimus has also evolved to match its polar environment, growing a longer snout than brown bears' and larger, paddle-like paws, both of which aid polar bears in hunting seals.
        
             
        
        
        
Muscular: The muscular system helps the frog to move. This system can help them escape from predators and catch prey. 
<span>Skeletal: The skeletal system provides support for the frogs body. This system goes along with the muscular system  
the skeletal part is support for the muscular parts</span>