The atmosphere is divided into five layers based on temperature variation. Starting from Earth's surface upward: Troposphere (0-12 km, weather phenomena occur here), Stratosphere (12-50 km, contains ozone layer), Mesosphere (50-80 km, meteors burn here), Thermosphere (80-700 km, auroras occur here), and Exosphere (above 700 km, outermost layer). Hence option (2) is the correct order.
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