Why do we have seasons?

Because of season fairies.

No.

It is mainly because of our earth's axis.

Our earth's axis is tilted at an angle of about 23.5 degrees.

Hence, as the earth revolves around the sun.

Sometimes the northern hemisphere points towards the sun, while sometimes the southern hemisphere.

This causes seasons.

It is too complicated.

All right.

Let us observe the northern hemisphere to learn more about seasons.

When the northern hemisphere points towards the sun, the sun rays directly strike the northern hemisphere.

Thus, the temperatures are high, resulting in summer season in that region.

However, when the northern hemisphere points away from the sun, the sun rays fall slanting on it.

Thus, the temperatures are low, resulting in winter season.

But when the northern hemisphere is neither tilted towards nor away from the sun.

The temperatures are moderate, resulting in spring and autumn seasons.

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