Context: Figure: Sonoran Desert.
The Sonoran Desert is a desert ecosystem in the southwestern United States and northwestern Mexico.
Which better describes the Sonoran Desert ecosystem?
A. It has dry, thin soil. It also has many different types of organisms.
B. It has deep, muddy soil. It also has many different types of organisms.
From the given choices, select the correct answer and reply with the letter of the chosen option.

A