Explanations:The duration of day and night is influenced by the Earth's axial tilt and its position relative to the Sun. The Earth's axis is tilted at an angle of approximately 23.5 degrees relative to its orbital plane. This tilt causes the Sun's rays to hit different parts of the Earth at varying angles throughout the year, leading to seasonal changes and variations in day and night duration.
At the equator, the Sun's rays are nearly perpendicular to the Earth's surface throughout the year, resulting in a nearly equal duration of day and night. As one moves away from the equator towards the poles, the angle at which the Sun's rays hit the Earth's surface changes more significantly, leading to more pronounced differences in day and night duration, especially during the solstices.
Thiruvananthapuram, the capital city of Kerala, is located at a latitude of approximately 8.5 degrees north. This places it relatively close to the equator, where the difference in day and night duration is minimal. Throughout the year, Thiruvananthapuram experiences nearly equal lengths of day and night, with the duration of daylight varying by only a few minutes.
In contrast, Bengaluru and Delhi are located at higher latitudes. Bengaluru is at approximately 13 degrees north, and Delhi is at about 28.5 degrees north. At these latitudes, the difference in day and night duration is more noticeable, especially during the summer and winter solstices. During the summer solstice, the day is longer, and during the winter solstice, the night is longer.
Therefore, Thiruvananthapuram is the correct answer as it is the location where the difference in day and night duration is minimal due to its proximity to the equator. Understanding the relationship between latitude and day-night duration is crucial for comprehending geographical and climatological patterns.