The winds shift from southwest to northwest as heavy rains and hail begin to fall in albany, new york. these changes are most likely caused by the arrival of a-) a warm front b-) an mt air mass c-) a cold front d-) a ct air mass

The correct answer is b-) an mT air mass.
MT (Maritime Tropical) air masses are warm and moist air masses. They originate in the Gulf of Mexico, where heat and moisture is transferred on the overlaying air. They move towards north and transport warm and moist air to the USA's southeast and alongside the Atlantic coast, thus increasing the precipitation.

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