Answer:
Option: Plantations located along coastal lowlands in the South.
Explanation:
The economy of the South based on the plantation, which requires the cultivation of crops. The plantation system came to dominate the culture of the South, where wealthy landowners owned acres of land for cultivation of cash crops like tobacco, sugarcane, rice, cotton, etc.
The southern colonies established in the coastal plains as it helped in with shipping their cash crops. The coastal lowlands in the South especially, South Carolina and Georgia practised rice plantation in the area. As rice crops needed regular irrigation, it helped landlords in growing rice in coastal lowlands.