Blue Ridge of region of Georgia receives the 'highest amount of annual precipitation'.
EXPLANATION:
The Blue Ridge is region of Georgia that receives the maximum rainfall. Blue Ridge is a range of mountains which is the highest.
The Blue Ridge mountains cool the warm and moist air from the 'Gulf of Mexico' leading to abundant rainfall in the region.
This is one of the 'main reasons' why many 'rivers' begin in this region and flow into the coastal plains. Heavy rainfall also result in a lot of erosion in this region.