The cycle of seasons on the Earth is caused by the tilt of the Earth on its axis toward and away from the Sun.

As Earth orbits the Sun, its axis stays tilted, so each hemisphere alternately tilts toward and away from the Sun. A hemisphere tilted toward the Sun receives more direct sunlight and has longer days, producing summer; when tilted away, it receives less direct sunlight and has shorter days, producing winter. So the statement is true: the seasons are caused by Earth’s axial tilt.

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