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The current spell of cold wave in the US has been a fall out of the :
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- polar vortex
- biodiversity and habitats
- climate and energy
- political administration
Correct Option: A
The 2013–14 North American cold wave was caused by southward shifts of the North Polar Vortex. On December 1, 2013, the weakening of the polar vortex led to the beginning of an abnormally cold trend in the Eastern and Central United States. The continued deterioration of the polar vortex led to the jet stream pushing southward, bringing record cold temperatures across the Eastern U.S.
