Answer:
He wrote mostly about the Midwest and its people.
Explanation:
Regionalism is when a writer wrote mostly about a certain geographical region, about the landscape, culture, and any features of a particular region. This means that the writer focuses on writing about that particular region and localized presentation.
Carl Sandburg can be described as a regional poet because his works mostly concern the Midwest area. His major works include <em><u>"The Chicago Race Riots (1919), Poems of the Midwest (1946), Chicago Poems (1916), and Cornhuskers (1918)"</u></em>, among others. His pattern of focusing on the people and culture of the Midwest made him a regional poet.
Thus, the correct answer is the third option.
