The zones that cover the smallest areas of Earth's surface are the polar zones (high latitudes).
Here's a brief explanation of each:
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Tropics (low latitudes): This zone, which lies between the Tropic of Cancer and the Tropic of Capricorn, covers a significant portion of the Earth due to its location near the equator.
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Temperature zones (middle latitudes): These zones, located between the tropics and the polar regions, also cover a considerable area.
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Polar zones (high latitudes): These zones, located around the North and South Poles, cover the smallest area compared to the other two zones. Their extent is limited by the harsh climate and geographical features, such as ice caps and glaciers.
Thus, among the three mentioned, the polar zones occupy the least surface area on Earth.