Name the principle of government that believes a governments authority is created by and for its citizens

Democracy.

Explanation:

Democracy is "ran by the people" as said by many people. With the citizens in charge of electing higher officials. Even the courts are ran by citizens (Jury.)

It could also be Aristocracy. But I'm certain it's Democracy.

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legislative branch:

one of the three branches of government divided between the senate and the house of representatives.

- creates or makes laws

- power to override a veto

executive branch:

one of the three branches of government, headed by the president.

- enforces or carries out laws

- power to veto a bill sent to it by congress

judicial branch:

one of the three branches of government, headed by the chief justice of the supreme court.

- interprets laws

- power to declare laws or actions by the government unconstitutional