I'd say that the <span>stylistic elements responsible for the stately yet economical effect of these lines from a poem are A. syntax, imagery, and allusion.
There's definitely syntax, because it refers to these short lines. And since I don't see any irony here, I'd choose A. 
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Answer:
Volcanic Activity.
Explanation:
The Hawaiian Islands were formed by such a hot spot occurring in the middle of the Pacific Plate. While the hot spot itself is fixed, the plate is moving. So, as the plate moved over the hot spot, the string of islands that make up the Hawaiian Island chain were formed.
 
        
                    
             
        
        
        
<h2>
Answer:</h2>
<em>Consequently and as a consequence are linking words which link reasons with results. They are common in formal writing. This is the fourth time that this has happened and, consequently, we can't accept further watches from you.</em>
<em>hope</em><em> </em><em>this</em><em> </em><em>help</em><em>!</em><em> </em>