Question : The current spell of cold wave in the US has been a fall out of the :
Option 1: polar vortex
Option 2: biodiversity and habitats
Option 3: climate and energy
Option 4: political administration
Correct Answer: polar vortex
Solution : The correct answer is Polar Vertex.
Cold spells in United States of America is because of polar vortex. Polar vortex is a large area of low pressure on both the poles of the earth. Northern Polar Vortex shifts southwards because of jet streams, which causes cold spells in Northern USA.
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