Which region is characterized by being arid enough to be classified as a desert, covering Botswana, Namibia, and South Africa?

The Kalahari Desert is the correct answer because it is the primary desert region that spans across Botswana, Namibia, and South Africa. This semi-arid sandy savanna is classified as a desert due to its low annual rainfall, which averages between 5 to 10 inches, creating conditions that support very few plant species and limited wildlife. The Kalahari is known for its unique ecosystems and landscapes, starkly different from those of other deserts such as the Great Sandy Desert in Australia, the Sonoran Desert in the United States and Mexico, and the Mojave Desert in California. Each of these other deserts has distinct vegetation and climatic characteristics, and they do not intersect with the geographic boundaries of Botswana, Namibia, and South Africa. Thus, the classification of the Kalahari as a desert makes it the appropriate answer for this question.