How did the roman republic became an empire?

Idon't really understand the question. it counts for 20% of my lesson grade and i really need putting the answer into words. anything will . i need asap so im awarding 30 points.a disagreement between states of the united states concerning the rights of states vs. the authority of the national government led to the civil war. state governments were forced by war into a subservient position. what might happen if national governments ceded their authority to a world government by international treaty?

Based on new mexico's transition from territory to statehood, which conclusions is best supported? a) hispanic's had litte interest in being part of the united states b) white americans distrusted those who were not like them c) native americans did not have voting rights in the united states d) president william h. taft was a native of new mexico

Concerns about the environment prompt congress to pass a $1 surcharge tax on each gallon of gasoline. which statement best describes the impact of such a tax