Question: Thunderstorms and hurricanes are examples of severe weather. Which of these weather conditions is necessary for the formation of thunderstorms and hurricanes?

  Options: 
 A. a cold rain falling to the ground
 B. air masses combining to create a high-pressure area
 C. winds spiraling downward and away from the center of a storm
 D. air moving toward the center of a storm and rising into the atmosphere 
Answer: D