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As hurricanes move over land, they become weaker mainly because :
the energy input is reduced
the terrain exerts additional frictional forces
land is a bad conductor
only (a) and (b)
Hurricanes are one of the most powerful and destructive forces on Earth. But did you ever wonder where they get their strength? The formation of a hurricane is complicated, but basically, it depends on three factors. First, you need warm water, at least 80 degrees. The second ingredient is moist air. And finally, there needs to be converging winds for a hurricane to form.
The actual process begins with a cluster of thunderstorms moving across the surface of the ocean. When the surface water is warm, the storm sucks up heat energy from the water, just like a straw sucks up a liquid. This creates moisture in the air. If wind conditions are right, the storm becomes a hurricane. This heat energy is the fuel for the storm. And the warmer the water, the more moisture is in the air. And that could mean bigger and stronger hurricanes. Satellite data shows the heat and energy transfer in action. Notice how this hurricane leaves a trail of cooler water behind.
Hurricanes form over low pressure regions with warm temperatures over large bodies of water. The warm temperature causes the ocean water to evaporate. As the hurricane moves over land, the hurricane is no longer fueled by this moisture. Therefore, the hurricane begins to slow down and die as it moves further inland. Hence option 4th is correct.
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