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Option 4: "Tornadoes form when a rotating air column draws in warm air from the ground, accelerating and creating a funnel."
Explanation: This option is correct as it accurately summarizes the main idea of the text. The text explains that tornadoes form when a rotating air column draws in warm air from the ground, which accelerates the spinning motion and creates a funnel. This aligns perfectly with the details provided in the text, making it the correct summary.
Option 1: "Tornadoes are visible as they start forming in the atmosphere."
Explanation: This option is incorrect because the text states that the whirling movements of tornadoes may not be visible to the naked eye. Therefore, claiming that tornadoes are visible contradicts the information provided in the text.
Option 2: "Tornadoes occur when wind direction changes and speed decreases, creating a vertical spinning column of air."
Explanation: This option is incorrect as it misrepresents the conditions for tornado formation. The text specifies that tornadoes occur when there is a change in wind direction coupled with an increase in wind speed, not a decrease. This fundamental error in understanding the cause of tornadoes makes this option incorrect.
Option 3: "Tornadoes are suspended from high-pressure storm clouds."
Explanation: This option is incorrect because the text clearly states that tornadoes are suspended from low pressure storm clouds, not high pressure. This contradiction in the type of pressure associated with tornado formation invalidates this option.
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