I think it may be conservation.
        
             
        
        
        
The answer is A because c doesn’t make sense if it’s vibrating wouldn’t we feel or see it?
        
             
        
        
        
I don’t understand the question! context?
        
             
        
        
        
Answer:
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Explanation:
 
        
             
        
        
        
Polar ice cap
Explanation:
The polar ice cap is an area on the earth that extends from 66.5° north and south of the equator to the poles. 
The polar ice cap is an area of very low temperature and the surface is mostly covered by ice.
- The vast polar ice caps the earth's northern and southern limits. 
- This is the region of the Arctic and Antarctic circle. 
- This region receives diffused solar radiation from the sun. 
- This is why they rarely warm up. 
- The region of the equator has no ice because they receive direct sunlight. 
- The soil here is frozen. 
learn more: 
Tundra brainly.com/question/2334099
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