Final answer:
The Great Basin is characterized by mountain ranges, valleys, and very little rainfall due to the rain shadow effect caused by surrounding mountains.
Step-by-step explanation:
The Great Basin is characterized by mountain ranges, valleys, and very little rainfall. This region is located in the western United States and is known for its dry climate due to the rain shadow effect caused by surrounding mountain ranges. As air rises over the mountains, it cools and releases moisture, resulting in limited precipitation to the east of the ranges. This creates arid and semi-arid conditions in the Great Basin.