Final answer:
The Great Plains are characterized by flat grasslands and are known for fertile agricultural land suitable for grains and cattle raising. Option A is correct.
Step-by-step explanation:
The expansive tract recognized for its vast, level grasslands is none other than the Great Plains. Stretching prominently across the heart of North America, from the Rocky Mountains to the Mississippi River, this region has earned its reputation as America's breadbasket, owing to the exceptionally fertile agricultural land it encompasses. The topography of the Great Plains, composed of sediments carried from the Rocky Mountains, is characterized by its extensive flatness and a semi-arid climate, providing an optimal environment for the cultivation of specific grains and the husbandry of cattle.
This geographical expanse stands in stark contrast to other distinctive regions such as the Gulf Coastlands, Central Valley, and Great Basin. While the Gulf Coastlands boast a different ecological profile, characterized by coastal influences, the Central Valley exhibits its own unique blend of features. Meanwhile, the Great Basin, with its enclosed topography, diverges from the sweeping flatness of the Great Plains.
The Great Plains, with its remarkable expanse and agricultural significance, stands as a testament to the diverse geographical tapestry of North America, offering a prime example of how varied landscapes contribute to the continent's multifaceted identity.