GCEGeographyWeather and Climate2022

The Inter-Tropical Convergence Zone (ITCZ) influences Nigerian climate primarily by

Abringing cold polar air masses from the Sahara Desert
Bdetermining the seasonal movement of rain-bearing winds across the countryCORRECT
Ccausing permanent low pressure over the Guinea Coast
Dgenerating the harmattan winds from the Atlantic Ocean
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Why the answer is B, and why the others tempt you.
The ITCZ is a belt of low pressure where the North-East Trade Winds (harmattan) and South-West monsoon winds converge. Its seasonal migration northward and southward determines the onset and retreat of the rainy season across Nigeria. The harmattan originates from the Sahara, not the Atlantic Ocean.
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