Which characteristic was common in southern geography?

The characteristic of broad coastal plains is emblematic of southern geography, particularly in states like South Carolina. These coastal plains offer a flat landscape that extends from the coastal regions inland, featuring areas conducive to agriculture and development. This terrain has historically supported crops such as rice, tobacco, and cotton, which were crucial to the southern economy.

Additionally, broad coastal plains in the south often have access to rivers and estuaries, providing transportation and trade routes that were vital during early settlement and development. This contrasts significantly with other geographical features like rocky terrain, which is more typical of mountainous regions or western states, or the high-altitude mountains found in areas like the Rockies or Appalachians. Lastly, polar climate zones are not applicable to the southern United States, which experiences a warmer climate, making the broad coastal plains the most fitting characteristic of southern geography.