A cosmic catastrophe jolts earth so that its axis is perpendicular to the orbital plane between earth and the sun. The largest effect of this change would be the elimination of seasonal variation.
What are seasons?
Seasons are caused by the rotation of earth around its axis and are marked by particular weather and climatic conditions.
In general, there are four types of seasons following each other and are named as spring, summer, autumn and winter.
Moreover, seasons vary depending on their temperature and length, associated weather, specific climate.
To put it simply, the tilted axis of the earth is mainly responsible for the formation of seasons
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