Why did the English build Fort King George in 1721?

To defend the southern border.

Explanation:

in 1721 the British army under the command of Col. John Barnwell built Fort King George, the southernmost Outpost of the British Empire in North America. The fort was used to defend the southern border of South Carolina against French and Spanish expansion into the area and against attack by the guale Indians

d. it spread christianity. i just took the test and got it right.

explanation:

the addition to geographic boundaries that might have  kept the people of the huang river civilization from traveling to far distance region is that they had learned about the other river valley civilizations but feared contact would bring invasion.

hope this .

plz give me brainliest!