Which of the following is a landform region found in north america. a canadian shield b exterior lowlands c exterior highlands d middle plains

D Middle Plains

Explanation:

They are also called as the middle plains and they are a broad and flat land that covers the prairies, steppes and the grasslands located in the United States and coves the noddle parts of the  Mississippi River has a length of about 3,200 km and has an area of about 1,300,000 km square. Covering the Alberta and southern Saskatchewan, and a narrow band of southern Manitoba. And their physiological division covers much of the middle North America and is referred to as plain states.