Which region is characterized by red clay and gently sloping hills and is the most highly populated region in Georgia, containing most of the state's major cities, including Atlanta?

O A. Ridge and Valley
• B. Coastal Plain
• C. Blue Ridge
• D. Piedmont

D. Piedmont

The region that is characterized by red clay and gently sloping hills, and is the most highly populated region in Georgia, containing most of the state's major cities, including Atlanta, is the Piedmont.

To find the answer to this question, we can analyze the characteristics of each region and identify the one that matches the description provided.

Let's start by looking at the options:

A. Ridge and Valley: This region is characterized by ridges and valleys formed by folded rocks. It typically does not have red clay and gently sloping hills, so we can eliminate this option.

B. Coastal Plain: This region is characterized by flat land and is located along the Atlantic Ocean. It does not match the description of red clay and gently sloping hills, so we can eliminate this option as well.

C. Blue Ridge: This region is characterized by mountains and valleys. It does not have the gently sloping hills mentioned in the question, so we can eliminate this option too.

D. Piedmont: This region is characterized by rolling hills and red clay. It is the most highly populated region in Georgia and contains most of the state's major cities, including Atlanta. This matches the description provided in the question, so the correct answer is option D, Piedmont.

To summarize, the region characterized by red clay and gently sloping hills and is the most highly populated region in Georgia, containing most of the state's major cities, including Atlanta, is the Piedmont region (option D).