Explain two ways that the lewis and clark expedition influnced the ecomic growth and the diversity of the united states durning the 1800s USE CER OR RACE

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?

Why do we observe black history minth?

Which of the following is a claim about ancient rome that a historian could build san argument around