Explanation:The answer is B because the passage does not really say why tornadoes are dangerous it mostly talks about how they form for example it When warm, humid air near the ground meets cold, dry air from above, a column of the warm air can be drawn up into the clouds. And it is not C because it is not comparing thunder storms to tornadoes, it only says that a tornado can occur during a large thunder storm. And the answer is also not D because it does not say anything about what to do in an event of a tornado.
