How does the idea of "checks and balances" contribute to american democracy?

Checks and balances allow for a more democratic system as no single person or even branch of government has the opportunity to take complete control of the government. For example, Congress can overturn a presidential veto with a 2/3 majority re-vote in both the Senate and House of Representatives. This prevents the president from vetoing everything, only advancing his personal agenda.

answer; /// i believe that the correct answer is (d)the huang he river valley;

the lowest among the social higher rank were the working class. this class remained detached to the political progression   of the country and was hostile to the other two classes