What must happen for most areas on Earth to experience all four seasons? •The Sun must reach its highest point in the sky.
•The Northern Hemisphere must experience winter.
•The axis must be tilted at a certain angle that."
remains unchanged.
•The north end of Earth's axis must always point away from the Sun.
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The correct answer is - The axis must be tilted at a certain angle that."  remains unchanged.

Explanation:

On the earth there ae many seasons but there are four major season, winter, summer, spring and autumn. The main reason that leads to all four season is the tilt of the sun at a specific angle that remain unchanged  which leads to change in the distance to the sun at specific time of the year which result in different rays of sun the part. So, whatever hemisphere or part tilted towards the sun leads to different season for instance:

North pole tilted towards the sun - summer in northern hemisphere

south pole tilted towards the sun -  winter in northern hemisphere

brown

explanation: