How did Charleston, SC and Savannah, Ga relate to the Anaconda Plan?

The correct answer to this open question is the following.

Although there are no options attached we can say the following.

Charleston, South Carolina and Savannah, Georgia related to the Anaconda Plan in that those were important maritime ports where the Confederate could receive weapons and war supplies from other parts, and the Anaconda Plan of the Union was to blockade southern ports along the Mississippi River to cut the Confederacy in half. This also included the important ports on the Atlantic Coast such as Charleston, South Carolina and Savannah, Georgia

General Winfield Scott had one idea that he shared with other Union generals: to block maritime ports of the Confederate states to divide the Mississippi River in two and could control the region. This would impede the passing of food, weaponry, and supplies much needed to the Confederated States. The plan was rejected by the Union Army, which rather decided to attack the Confederates.

these civilizations were located around fertile rivers, where they could produce an abundance of crops