The correct answer is D nitruous oxide
        
                    
             
        
        
        
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what is the question?
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Answer:-Theory proposes the world system as a set of mechanisms which distributes resources from the periphery to the core. -Wallerstein stated that the core is the more developed, industrial part of the world, and the periphery is the raw materials-exporting, poor part of the world.
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Groups that organize on the basis of some mutual interest are classified as being voluntary assocciation