The ambition of every mississippian in antebellum mississippi was to own a large plantation and have many slaves to help operate it
Trade flourished because these progressing empires were developing new ways to produce products and utilize agriculture in their areas, such as Han with silk and Rome with olives and fishing/seafaring. These empires has never had access to goods that were from other areas before the Silk road, causing trade to become immensely popular and relied upon.
This is called checks and balances
The first three boxes going vertically go in the last box and the remaining split into the first one, leaving the 7th and 6th going to the middle one.
