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GS Geography Physical Geography of World
Q.

Trade winds are due to:
Explanation:

ANS. (B) 
The air moving across the surface towards the extra heated region is known as the trade winds. The region where the northern convective airflow meets the southern and the air starts heading up instead of across the surface is known as the doldrums by sailors. The upwelling warm moist air expands, cools and drops heavy rain, but since it’s moving up instead of across it won’t fill sails.

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