The correct answer is 3) rich soil and warm climate.
The geographic features that contributed to the economic development of the plantation system in the South were rich soil and warm climate.
For instance, the case of the Middle colonies that were known as the "Breadbasket of America" for the many and goods crops they produced. We are referring to New Jersey, Delaware, Pennsylvania, and New York. Or the Southern Colonies such as Virginia, Georgia, North Carolina, South Carolina, and Maryland, with their big plantations that were favored by rich soil and warm climate.
