The lowest temperature is usually observed:

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At the time of sunset

Near midnight

Several hours before sunrise

Around sunrise

answer is D.

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Detailed Solution

Concept- Several natural and man-made factors can cause changes in the environment. The level of pollution can have a significant impact on a region's climate.
Even though you can usually anticipate a decrease in air temperature as the evening and night progress, the lowest temps usually don't occur until just before morning. The time of day when the Earth receives the least solar energy is just before sunrise. This is mostly due to how the Earth is positioned concerning the sun. As a result, sunrise is when the temperature is the lowest in any given place.
Hence, the correct answer is option 4.

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