What desert is located in Arizona and is known for its unique cacti?

The Sonoran Desert is the correct answer because it is famed for its distinctive cacti, particularly the iconic Saguaro cactus, which can reach heights of up to 40 feet and live for more than 150 years. This desert spans parts of Arizona, California, and Mexico, boasting a diverse ecosystem that includes a variety of plant and animal species, which are well adapted to its arid conditions.

In contrast, the Mojave Desert, while it does host some cacti and stretches through parts of Southern California, does not possess the same level of biodiversity or iconic cactus species as the Sonoran Desert. The Great Basin Desert is located to the north of the Sonoran Desert and is primarily characterized by sagebrush and grasses rather than cacti. Lastly, the Chihuahuan Desert is located to the southeast of the Sonoran Desert, predominantly in New Mexico and Texas, and also features different flora and fauna that are distinct from those found in the Sonoran Desert.