The approximate average ocean depth along the continental shelves bordering North America is 3958m. The average depth of the continental shelf, however, is 200m
        
             
        
        
        
Habitat climate,warmer temperatures and increased radiation Hope this helps
        
                    
             
        
        
        
Answer:
Explanation:
he theory that early Proto-Indo-European speakers spread westward on horseback, overpowering earlier inhabitants and beginning the diffusion and differentiation of Indo-European tounges. Dispersal Hypothesis.
 
        
             
        
        
        
The legend is that Newton discovered Gravity when he saw a falling apple while thinking about the forces of nature. Whatever really happened, Newton realized that some force must be acting on falling objects like apples because otherwise they would not start moving from rest.
        
             
        
        
        
is about 55 miles at its narrowest point. so around 50 miles would be the answer.