Answer: The correct answer is the middle of the United states has fewer changes in elevation than the western of the United States.
Explanation: In the middle of the U.S.A, we find the Great or sometimes called simply "the Plains" which is the broad expanse of flat land (a plain), much of it covered in prairie, steppe, and grassland, that lies west of the Mississippi River. It is called tall grass prairie in the United States and it is located to the east of the Rocky Mountains in the U.S. and Canada. It embraces:
The entirety of the U.S. states of Kansas, Nebraska, North Dakota, and South Dakota, parts of the states of Colorado, Iowa, Minnesota, Montana, New Mexico, Oklahoma, Texas, and Wyoming and the southern portions of the Canadian provinces of Alberta, Manitoba, and Saskatchewan
. The region is known for supporting extensive cattle ranching and dry farming. On the other hand, on the western part of the U.S.A, we find the Rocky mountains also known as the Rockies which are a major mountain range in western North America. The Rocky Mountains stretch more than 4,800 kilometers (3,000 mi) from the northernmost part of British Columbia, in western Canada, to New Mexico in the Southwestern United States. Placed within the North American Cordillera, the Rockies are somehow different from the Pacific Coast Ranges, Cascade Range, and the Sierra Nevada, which all lie farther to the west.
