The tilt of Earth's axis around the Sun causes the Earth's seasons by changing the angle of sunlight reaching the hemispheres.
The tilt of Earth's axis as it orbits around the Sun is the factor that causes Earth's seasons. This tilt results in different angles of sunlight reaching the Northern and Southern Hemispheres at different times of the year, leading to variations in temperature and the length of day.
When a hemisphere is tilted towards the Sun, it experiences summer, while when it's tilted away, winter occurs. This phenomenon explains why the two hemispheres have opposite seasons throughout the year.
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