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Not only in the Arabian peninsula but also in the whole world most Muslims are Sunni.
The Arabian Peninsula was covered with desert.
The Arabian Desert covers almost all of the Arabian Peninsula. It is the third largest desert in the world.
The Arabian Peninsula was covered with desert.
The Arabian Desert covers most of the Arabian Peninsula.
Most oilfields on the Arabian Peninsula are in the northeast, close to the Persian Gulf.
Nearly all of the Arabian Peninsula is covered by deserts.
The Arabian Peninsula is primarily a hot, subtropic desert climate.
I presume the answer is agriculture.
That would be the Arabian Desert.
Saudi Arabia controls most of the peninsula.
Saudi Arabia occupies most of the peninsula.