The correct answer is Option 3. Explanation & Key Takeaways: Colorado Plateau • The Colorado Plateau includes Utah, Arizona, and New Mexico. • It is divided by the Colorado River and the Grand Canyon. • It is the largest plateau in America, and it covers an area of 337,000km2and its highest elevation is about 2,450m above sea level. • This plateau is an example of an intermontane plateau. • Mesas and buttes are found here in many places. • The plateau is known for the groundwater which is under positive pressure and causes the emergence of springs called Artesian wells. Columbia Plateau • The Columbia Plateau is located in parts of Washington, Oregon, and the Idaho states of the U.S. • It is surrounded by the Cascade Range and the Rocky Mountains and it is divided by the Columbia River. • This plateau has been formed as the result of volcanic eruptions with a consequent coating of basalt lava (Flood Basalt Plateau). Piedmont plateau • Lying south of the northern mountain rampart, the submontane plateau has four distinct divisions—the Trans-Indus plains, the Potwar Plateau, the Salt Range, and the Sialkot region. • The Trans-Indus plains, west of the Indus River, comprise the hill-girt plateaus of the Vale of Peshawar and of Kohat and Bannu, all of which are oases in the arid, scrub-covered landscape of Khyber Pakhtunkhwa. • Gravel or clay alluvial detritus covers much of the area and is formed from loose particles or fragments separated from masses of rock by erosion and other forces. Glacier erosion plateau • Greenland, the world’s largest island, lies in the North Atlantic Ocean. • Greenland is noted for its vast tundra and immense glaciers. • Although Greenland remains a part of the Kingdom of Denmark, the island’s home-rule government is responsible for most domestic affairs. The Greenlandic people are primarily Inuit (Eskimo). • The capital of Greenland is Nuuk. • The continental glaciers are found in Antarctica and in Greenland. • The island consists almost entirely of a vast inland plateau covered in ice up to 9,800 ft (3,000 m) thick.