Because it's the way the land evolved.
Most of the Arabian Desert is located in Saudi Arabia and covers nearly all of that country.
Most of it is in Botswana.
In Australlia i think
Think of all the desert animals you can think of then answer the question with what desert animal goes where.
Australia has the most desert in Oceania.
Saudi Arabia is covered by most of the Arabian Desert.
The Negev Desert covers most of the southern half of Israel.
The Kalahari Desert covers most of Botswana.
Botswana
Botswana
The Kalahari Desert covers nearly the entire country of Botswana.
The Libyan Desert, part of the larger Sahara, surrounds most of Egypt.