This form of government allows the people retain the supreme power because they choose leadership using fair and free elections.

A. monarchy
B. theocracy
C. dictatorship
D. democracy
E. anarchy

democracy is the correct answer of above question.

explanation:

i have ni idea

explanation:

the addition to geographic boundaries that might have  kept the people of the huang river civilization from traveling to far distance region is that they had learned about the other river valley civilizations but feared contact would bring invasion.

hope this .

plz give me brainliest!