One principle of the U. S. constitution that spreads power out between different governments is called?

i would say b. or c.

industrial revolution, in modern history, the process of change from an agrarian and handicraft economy to one dominated by industry and machine manufacturing

polisit can also mean a body of citizens. in modern historiography, polis is normally used to indicate the ancient greek city-states, like classical athens and its contemporaries, and thus is often translated as "city-state". the body of citizens came to be the most important meaning of the term polis in ancient greece.