Variations in the length of daytime and nighttime from season to season are primarily due to the revolution of the Earth on a tilted axis (Statement 4). This tilt causes different parts of the Earth to receive varying amounts of sunlight throughout the year, resulting in changes in the duration of daylight and darkness. The Earth`s rotation on its axis (Statement 1) affects the daily cycle of day and night but does not cause the seasonal variations. The Earth`s revolution around the Sun in an elliptical manner (Statement 2) affects the distance between the Earth and the Sun but does not directly impact the length of daytime and nighttime. The latitudinal position of a place (Statement 3) does influence the length of daylight to some extent, but it is not the primary factor responsible for the seasonal variations in day and night lengths.