As strange as it may seem, around 75% world’s tornadoes
occur in the United States. It's actually because of the unique
geography of North America, and how the winds and storms
get funneled up through the US. (choice-b)
It's true that when there's a tornado, it usually comes along with a thunderstorm. But tornadoes are way way LESS common than thunderstorms.
Their main danger is from the high winds in the center of the funnel.
The rain is minor compared to the wind damage.
Tornadoes are not really the strongest storms on Earth.
Welll ... I guess that could depend on what "strong storm" means.
Sure, a tornado is incredibly vicious and powerful. But it's only a few
miles wide, and it only lasts for a few hours and then it's all over.
The tropical cyclones ... hurricanes, monsoons, typhoons ... don't have
winds as fast as tornadoes, but they can be a thousand miles wide and
last for weeks.
