Answer:
The description corresponds to an observational study.
Explanation:
In Observational studies, researchers observe the effect of a risk factor without changing what is exposed to it or its conditions. On the other hand, in an experimental study, researchers can introduce a change and study the effects of it.
 
        
             
        
        
        
U.S. Gross Domestic Product predicts the final goods produced in the U.S., while the U.S. Gross National Product analyzes the Delivery of final goods & services by American development factors
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<u>Explanation:
</u>
The total dollar for any finished production of goods & services in the borders of the nation within a specified period is Gross Domestic Product (GDP). Although GDP is typically calculated every year; it can be measured on every year. 
GNP must compensate both nationally and worldwide for U.S. citizens' and companies' investments and should calculate the value for all products produced locally, regardless of how they are created. GNP doesn't include income from overseas nationals and businesses in the America.
 
        
                    
             
        
        
        
The answer would be Situational Leadership in which the followers maturity increase and thus the behavior of the leader would be less structured thus would require less socio emotional support. The Situational Leadership model is produced by Paul Hersey as well as Ken Blanchard also.
        
             
        
        
        
The Jews are who the Nazis killed
        
             
        
        
        
The barbarian tribe that had a writing system called the runic alphabet that archaeologists have found carved in wood, metal and stone in Europe was the Vikings.