Question

what causes seasonal changes​

Answer 1

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.

Answer 2

By the rotation of the earth.

Explanation:

when earth faces towards sun then it is summer season and other side winter season.