Answer:
The Okefenokee Swamp..
The Chattahoochee River...
Explanation:
The others are incorrect because:
The Fall Line separates the Piedmont from the Atlantic Coastal Plane.
The Appalachian Mountains are found in northWESTERN Georgia.
The Barrier Islands are swamps, marshes, and beaches, which also protect the mainland from waves.
The Savannah River forms part of Georgia's border with SOUTH Carolina.
