Final answer:
The term 'republic' is used in the Pledge of Allegiance, Northwest Ordinance, and the Constitution of the United States to describe a form of government where power rests with the people and representatives are elected to make decisions on their behalf.
Step-by-step explanation:
In the Pledge of Allegiance, the term 'republic' is used to describe the form of government that the United States has. It refers to a system where power rests with the people, who elect representatives to make decisions on their behalf. Similarly, in the Northwest Ordinance and the Constitution of the United States, 'republic' is used to signify the requirement for states to have a representative form of government.