B is correct—a natural port.
Savannah was created primarily due to the location's natural port. Georgia's coast is home to Savannah, which is situated along the Savannah River and has quick access to the Atlantic Ocean. It was a perfect position for trade and business thanks to its natural port, which facilitated the passage of both people and products. The choice to build Savannah as a colonial town was significantly influenced by the availability of a natural port.