Take a look at the following Tornado risk map. What is the most likely reason that tornadoes form in the central and southern parts of the United States?

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Maritime polar air masses off the coast of Canada collide with continental tropical air masses from Mexico creating tornadoes that move west to east because of the jet stream creating destruction and possible loss of life.

Continental polar air masses from Canada collide with maritime tropical air masses from the Gulf of Mexico creating tornadoes that move west to east because of the jet stream creating destruction and possible loss of life.

Continental polar air masses from Canada collide with continental tropical air masses from Mexico creating tornadoes that move west to east because of the jet stream creating destruction and possible loss of life.

Maritime polar air masses off the coast of Canada collide with maritime tropical air masses from the Gulf of Mexico creating tornadoes that move west to east because of the jet stream creating destruction and possible loss of life.

Continental polar air masses from Canada collide with maritime tropical air masses from the Gulf of Mexico creating tornadoes that move west to east because of the jet stream creating destruction and possible loss of life.