Which of the following is NOT one of the three main deserts located in the Western Plateau?

The correct answer points to the Simpson Desert, which is indeed not one of the three main deserts in the Western Plateau region of Australia. The three primary deserts in that area are the Great Victoria Desert, the Great Sandy Desert, and the Gibson Desert.

The Great Victoria Desert is the largest desert in Australia and spans parts of Western Australia and South Australia. Its vast arid shrublands are typical of the environment found in the Western Plateau. The Great Sandy Desert is bordered by areas such as the Pilbara and is characterized by its red sand dunes and sparse vegetation. The Gibson Desert, situated to the southwest of the Great Sandy Desert, is also known for its sand plains and is relatively less vegetated.

The Simpson Desert, on the other hand, is primarily located in the Northern Territory and South Australia, and is distinguished by its prominent parallel sand ridges. Although notable, it does not fall within the bounds of the Western Plateau’s main desert classifications. This geographic distinction is crucial in understanding the layout and classification of Australia's desert regions.