Explanation

موسم بدلتا ہے کیونکہ زمین سورج کے گرد گھوم رہی ہے۔

Earth's tilted axis causes the seasons. Throughout the year, different parts of Earth receive the Sun's most direct rays.

So, when the North Pole tilts toward the Sun, it's summer in the Northern Hemisphere. And when the South Pole tilts toward the Sun, it's winter in the Northern Hemisphere.