Answer:
First of all How do seasons occur?
→Seasons occur because of the tilt of the Earth's axis.
Why are there different seasons in different parts of the world?
There are different seasons in different parts of the world because of the Earth's tilt only. When the Earth tilts towards the sun, that region receives direct rays of the sun and thus have summer season. While the other region which is away from the sun does not receive that much sun rays and thus have winter season.
Hope this helps
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