What causes a cold front? a. the front of an advancing storm is abnormally cold. b.a cold air mass moves up against the rocky mountain front. c.a cold air mass moves in under a warm air mass. c.a warm air mass moves in over a cold air mass. d.the jet stream moves north into central canada.

option c - Cold front is formed when cold air is moves under the warm air

Explanation:

Cold front is formed when cold air is moves under the warm air. in other word it is right to say when cold air replace the position of warm air then it help to form cold front. direction of cold front is generally from northwest to southeast.

cold front is blanket of cool and dry air than area in front of cold front. there is vast change in temperature in both side of cold front

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