A. Because it is the most used so it has to be dominated. IN MY OPONION. HOPE THIS HELPS!
The sahara made migrating rough because it was a desert but it was easier to pass through rather than south afria going through jungles
Geographers use the regional unit to map features of particular interest, and data can be compared between regions to help understand trends, identify patterns, or assist in explaining a particular phenomenon. Regions are traditionally defined by internal characteristics that provide a sense of place.
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