6th grade history i mark as brainliest

In this theory for forming a government, violence has made people follow a leader. evolution theory force theory divine right theory social contract theory

How did the northern u.s. change during the 19th century? select the best choice from the answers provided. a. it became more industrial. b. it became more agrarian. c. it became less populated. d. it became less diverse

Which statement is true of both presidential and parliamentary systems of government?