Answer:
The Earth's rotation on its axis
Step-by-step explanation:
The current cycle of day and night is 12 hours day and 12 hours night. If the Earth rotated at a faster rate, we would have shorter cycle of days and nights. However, if the Earth rotated at a slower rate, we would have a longer cycle days and nights. The Earth's rotation is a major factor when looking at the length of the days and nights.
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