Clouds reflect a large portion of the sun's energy, so if cloud cover declines, the amount of energy absorbed by land and oceans would increase, causing a temperature increase as well.
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A good conclusion in a research paper restates the hypothesis so that reader can see the value of argument which either defends or criticizes the hypothesis.  If it's a long paper it's a good idea to restate the hypothesis in the conclusion. This reminds the user of the hypothesis and draws the paper together. It also revisits the hypothesis and can provide new insight into the hypothesis. Another reason for restating the hypothesis in the conclusion is to pose questions and open the door for future research.  
        
             
        
        
        
The correct answer is B. Prokaryotes do not have a nucleus, while eukaryotes do.
        
             
        
        
        
Answer by Mimiwhatsup: C. Convergent boundary
Why is this right: Convergent boundaries but also known as 'destructive' is a(n) region of active deformation( an act of deforming, or at the state of being deformed) which is where two or more tectonic plates or fragments of the lithosphere are near end of their life cycle.