Final answer:
The southwest region of the United States is mostly characterized by arid desert landscapes and semi-arid steppe climates. It includes states such as Arizona, New Mexico, Texas, and parts of California, Nevada, Utah, and Colorado. Dominant landforms in the region include deserts and mountain ranges.
Step-by-step explanation:
The southwest region of the United States is mostly characterized by arid desert landscapes and semi-arid steppe climates. This region is primarily composed of states such as Arizona, New Mexico, Texas, and parts of California, Nevada, Utah, and Colorado. The dominant landforms in the southwest include vast deserts like the Sonoran Desert and the Mojave Desert, along with mountain ranges such as the Sierra Nevada and the Rocky Mountains.
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