The given clause, "whoever wins the contest a savings bond" is a subordinate or a dependent clause. This kind of clause does not convey a complete thought and needs the main sentence in order to make it understandable. This subordinate clause is connected to the main clause with the subordinating conjunction "whoever". 
        
                    
             
        
        
        
Answer:
 because it was literally greater than any waged before: over 59 million troops were mobilized , over 8 million died and over 29 million were injured in a struggle which sharply altered the political, economic, social and cultural nature of Europe.
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Answer:
Will Human Life on Earth Come to an End?, Seventh Grade ...www.readworks.org
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Answer: need a little more background information
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