Final answer:
Plains are areas with many different landforms of the same type, and they can include features like mountains and river valleys. Plateaus and mesas are also important geographic features that define a region's landscape.
Correct option is B. Plains.
Step-by-step explanation:
Areas with many different landforms of the same type are called plains. A plain is a large area of flat or gently rolling land that can include various physical features such as mountains, tablelands, and river valleys. Examples of plains include the Great Plains of North America, which were historically inhabited by various indigenous groups who utilized the land for hunting and farming before experiencing significant changes due to European colonization.
In addition to plains, other types of landforms like plateaus and mesas add to the complexity of a region's geography. A plateau is a large, flat area that is elevated above its surroundings and typically larger than a mesa. Geographic diversity, including features such as the Rocky Mountains, the Mississippi River, and various European landforms like the Alpine region, contributes to biodiversity and the shaping of cultural histories.