how and why North Africa is categorized regionally with Southwest Asia, separate from sub-Saharan Africa.

Fold mountain and desert region

Explanation:

The region of the North Africa is a northern part of the African continent and it stretches from the Atlantic shores in the west and to the red sea and Egypt in the east and is this distinction is created by the Sahara and Sahel regions were aridity is a feature that circumscribes its boundary. And is grouped with the middle east under the middle east and the north Africa and is geopolitical termed as greater middle east as it shares the similar cultural characteristic of that of middle east and the Islamic region.