Slavery was declining (less people used slaves) during the early
1800's in the U. S. What circumstances changed or reversed this
decline. Why was there an increase (more) in the need for slaves in the
South (Think of Cotton production).

The South relied on slavery heavily for economic prosperity and used wealth as a way to justify enslavement practices.

Explanation:

answer; /// the correct answer is evidence of the olmec civilization has been found in southern american in a hot steamy forest, archaeologists have found earthen artifacts at several sites that were evidence of the olmec civilization. these   artifacts were mounds,courtyards and pyramids build of stones, also on top of the mounds were many monuments made of stone, some of these stone structures are very large, they weigh as much as 44

the right answer is the end of world war ii

after the end of a global wwii all the nations involved, in an attempt to create an organization to maintain world peace. this agreement would work settling international disputes via negotiation and arbitration instead of leading the issues escalate to another war.