I’m not entirely sure what is being asked here, but the Tigris and Euphrates rivers is the only place in Egypt (besides the nile delta) with non-arid ground. That’s why most people live around there:
It is topography that is formed from the dissolution of soluble rocks such as limestone.
Answer: Subduction happens and one plate moves below the other. Magma seeps up along plate boundaries and forms mountains.
Explanation:
Time distance decay
Hope it helps :)