Why was slave labor so important to the economy of the southern colonies?

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?

Explain how zollverein, a tariff agreement, to unite the german states.

The world is too much with us; late and soon, getting and spending, we lay waste our powers: little we see in nature that is ours; we have given our hearts away, a sordid boon! the sea that bares her bosom to the moon; the winds that will be howling at all hours, and are up-gathered now like sleeping flowers; for this, for everything, we are out of tune; it moves us not—great god! i'd rather be a pagan suckled in a creed outworn; so might i, standing on this pleasant lea1, have glimpses that would make me less forlorn; have sight of proteus rising from the sea; or hear old triton blow his wreathed horn. 1lea: a grassland what phrases in this poem make elements of nature seem big and powerful, or sweet and beautiful? second part: the changes of the industrial age, including those leading to the agricultural revolution, still affect people’s lives. choose a modern song or a television show that idealizes rural life or compares rural life to urban life. how does this song or television show describe city life and the countryside? cite evidence from the performance to support your answer.