What crop made the South an economic powerhouse and expanded
slavery in the process?

Production exploded: Between 1801 and 1835 alone, the U.S. cotton exports grew from 100,000 bales to more than a million, comprising half of all U.S. exports. The upshot: As cotton became the backbone of the Southern economy, slavery drove impressive profits.

Explanation:

answer; /// slavery should be outlawed in the new country, was part of the initial draft of the declaration of independence, but not part of the final

the option which was not a function of missionaries in the northwest was the first one - they established posts for trading furs and other goods.

missionaries were sent around the world to spread religion and their knowledge and others - they were not merchants who sold furs and other goods.