Variations in the length of daytime and nighttime from season to seas...

UPSC Prelims 2013 Geography

Variations in the length of daytime and nighttime from season to season are due to -

Explanation

The Earth's axis is tilted at an angle of 23.5 degrees relative to its path around the Sun. This tilt means that different parts of the Earth receive direct sunlight for varying lengths of time throughout the year, leading to seasonal changes in day and night length. Hence, the correct answer is B.

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