Alpine Tundra are found at the tops of tall mountains.
 
And it differs because the <span>Arctic refers to Northern latitudes, alpine refers mountainous regions.</span>
        
             
        
        
        
Answer:
B
Explanation:
because their structures become more complex. Such as the human brain, over time we get more knowledge. 
 
        
             
        
        
        
Is there any optional answers?
        
             
        
        
        
Compare the limbs of different organisms goes in left box. compares fossilized structures to living organisms left box. 
other 2 go in the right box hope this helped(: