The statement that describes the similarities between the governments of the Navajo Nation in Arizona and the United state is that "all are lead by a President and Vice President."
Aside from having President and Vice President, both the US government and Navajo Nation also have "have legislative, executive and judicial branches."
The establishment of the government in the United States is based on Constitution. In contrast, the establishment of government in the Navajo Nation is based on what their Tribal government agreed on in 1989.
Hence, in this case, it is concluded that both the US and Navajo Nation are similar in many ways.
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The society that is being described in the sentence above is the agricultural societies because this is the society were they practice of shifting power from the heads of the families and as well as the clans to a ruling elite that had a cause of creating an increase to inequality.
In order to vote, a person must be 18 years of age or older, a US citizen and legally registered to be allowed to vote.