Explanation:

- Option 1: Rotation

- Correct Answer: The rotation of the Earth around its axis is the reason for the occurrence of day and night. As the Earth rotates, different parts of its surface move into and out of sunlight.

- Option 2: Revolution

- Refers to the Earth's orbit around the Sun. While revolution affects the seasons, it does not directly cause day and night.

- Option 3: Tilt of Earth

- The tilt of the Earth's axis affects the intensity of seasons but doesn’t cause day and night. It leads to variations in the sun's path across the sky.

- Option 4: Position of Earth

- The Earth’s position in its orbit doesn't cause day and night. However, it influences seasons based on how Earth's tilt affects sunlight distribution globally.