D. A cold, dry air mass interacts with a warm, moist air mass.
Step-by-step explanation:
Tornadoes are very scary and kind of cool to look at. They have a great scientific reason behind them which we can easily understand. First, a funnel cloud forms that reaches down to the ground (you probably have seen this in video as a cloud that is heavily densed and circling). Then , warm air rises, resulting in a decrease in air pressure and finally, a cold, dry air mass interacts with a warm, moist air mass.
Answer that it is called suppose that the following data characterize the United States and four instead official Proverty line for four family of four in 1997 and 16,000 median income for a four person families and 40,019 97 I hope this helps