Potomac. Savannah. Altamaha.
At that early point in the history of colonial Africa most borders were based on geographical features, primarily rivers.
The Southern Colonies had lots of watery landform's. Such as bays, rivers, lakes, and swamps.
Wabash, Ohio and Mississippi respectively
The Southern Colonies had various types of land forms including barrier islands, mountains, and rivers. They also had rolling hills and sedimentary rock.
Fertile soil, harbors and rivers and a long growing season
Economy in The Southern Colonies was based on plantations and slavery. The main crops that were grown were Indigo, Tobacco, Wheat, and Rice due to the easy irrigation from nearby rivers.
none of the rivers form the southern border of Indiana, but the Ohio river forms the southern border of Ohio.
They had rivers, the Atlantic Ocean, trees, good soil, and other stuff. :0)
Land, and Mountains
Both are landlocked countries in their continents, each with a river as southern border.
It was the warmest climate of the three colonies it was humid there was no rain
Because it made bulk transport of cotton to the coast and from there overseas the easiest. Cotton was an export industry, and the Southern colonies were untill the Civil War the biggest producers in the world.