JAMB - Geography (2023 - No. 60)
Barchan dunes move
at right angle to the prevailing wind
in the same direction as the prevailing winds
in the same direction as the prevailing winds
in a circular direction
Shpjegimi
A barchan is a cresentic or moon-shaped structure. A barchan is formed when an obstacle like rocks impedes or prevents the movement of wind