Answer:
rolling terrain/plateaus and Agriculture/Ranching
Explanation:
The Great Plains region has generally level or rolling terrain; its subdivisions include Edwards Plateau, the Llano Estacado, the High Plains, the Sand Hills, the Badlands, and the Northern Plains. The Black Hills and several outliers of the Rocky Mts. interrupt the region's undulating profile.
Agriculture became the dominant industry of the American Great Plains and Canadian Prairies during the second half of the nineteenth century and the early decades of the twentieth century. Farming operations had, of course, been carried on in some parts of the Plains for many years. Ranching is a large industry in the Great Plains. Sheep, cattle, and goats are raised here and the short grass of the prairie is used for grazing.
