Which one of the following statements is correct with reference to nor

Which one of the following statements is correct with reference to normal lapse rate?

Temperature is highest at ground level and decreases with increasing altitude.
Temperature is lowest at ground level and increases with increasing altitude.
Temperature remains stable with increasing altitude.
Temperature first increases with increasing altitude and gradually starts decreasing.
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UPSC CAPF – 2022
The normal lapse rate refers to the rate at which atmospheric temperature decreases with an increase in altitude. In the troposphere, temperature is generally highest at or near the ground level and decreases as you move higher.
The normal lapse rate is approximately 6.5°C per kilometer (or 3.5°F per 1000 feet) in the troposphere. This decrease occurs because the atmosphere is primarily heated by the Earth’s surface.
There are instances where temperature increases with altitude, known as temperature inversion. These inversions occur under specific atmospheric conditions but are not the normal lapse rate.