Answer:
Option: Southern colonies needed a larger labor force to harvest their crops.
Step-by-step explanation:
The Southern colonies were much favorable in climate and geographical condition with fertile land that made the South more agreeable for harvesting crops. Most of the estates (plantations) grew cash crops such as cotton, tobacco, rice and indigo; which were considered to be profitable in the market for both domestic and exports. To run these plantations labor was required, slaves were taken as labor to work in fields that gave growth in the slave market.