How do air masses interact to form a tornado? o a. cold, dense air flows toward the warmer, less dense air, so the cold front ends up moving faster than the warm front. o b. a cyclone rotates faster and faster as pressure differences between areas of low and high pressure increase. o c. a cyclone becomes slower and slower as pressure differences between areas of low and high pressure decrease. o d. two air masses meet, but neither moves into the other one and spiral wind results.

The answer is A. The Air masses always have to deal with it warmer air moves upward and cold air goes downward they do not mix and they're being moved with wind so it cause a spiral which is a terrible sight to be around but is so cool to watch

D. Two air masses meet, but neither moves into the other one and spiral wind results.

Explanation: You need two different air temperatures to meet but neither of them move into the other.

italian workers migrated to northern provinces

answer; european crusades;