Answer: There are 3 
Explanation: Diversity within species (genetic diversity), between species (species diversity) and between ecosystems (ecosystem diversity).
 
        
             
        
        
        
The River Valley civilizations that emerged on the Yellow River ( China ), the Indus River ( India ), the Nile River (Egypt ), and between the Tigris and Euphrates Rivers ( Mesopotamia ) made lasting contributions to civilizations.
        
             
        
        
        
A similarity would be that the people have a voice in government.
        
             
        
        
        
The Seventeenth Amendment to the U.S. Constitution:
The Senate of the United States shall be composed of two Senators from each State, elected by the people thereof, for six years; and each Senator shall have one vote.
this is from --> www.senate.gov
 
        
             
        
        
        
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