A mountain is a single standing one such a Mount Fuji. A mountain range is a chain of mountains such as the Himalayas
 
        
             
        
        
        
Answer:
I think it is 180 degrees.
Explanation:
 
        
             
        
        
        
The country of Brazil & Bolivia are the pair which share a border.
The border in this context refers countries which shares a close or immediate boundary. For instance, the nation of U.S. and Canada shares a border.
Here, the pairs including "Belgium & Bulgaria", "Belize & Barbados" and "Belarus & Bangladesh" does not share a  boundary.
Hence, the country of Brazil & Bolivia are the pair which share a border.
Therefore, the Option B is correct.
Missing options includes <em>"a. belgium & bulgaria b. brazil & bolivia c. belize & barbados d. belarus & bangladesh."</em>
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Read more about Border
<em>brainly.com/question/1336648</em>
 
        
                    
             
        
        
        
B. Both continental and ocean-floor topography are measured relative to sea level 
Explanation: 
On a topographic map, both continental and ocean-floor topography are measured relative to sea level. 
The sea level is the reference surface for the continental and ocean floor topography. 
- A topographic map is a map that shows landform using series of contour lines. 
 - The lines joins places of equal elevation. 
 - The elevation is usually referenced to the sea level surface. 
 - The sea level is taken as the surface with 0 depth or height. 
 - Continental topography is all places above the sea level. 
 - Ocean floor is below the sea level surface 
 
learn more: 
Physical map brainly.com/question/3687554
#learnwithBrainly
 
        
             
        
        
        
I Think The answer is c I hope it helps My friend Message Me if I’m wrong and I’ll change My answer and fix it for you