Question

why does the seasons change on the Earth

Answer 1

Some assume our planet's changing distance from the sun causes thechange in the seasons. That's logical, but not the case, for Earth. Instead,Earth has seasons because ourplanet's axis of rotation is tilted at an angle of 23.5 degrees relative to our orbital plane – the plane of Earth'sorbit around the sun.

Answer 2

HEY THERE..........
HERE IS YOUR ANSWER.........
▶▶▶▶▶▶▶▶▶▶▶▶▶▶▶▶▶▶▶
☜☆☞ The seasons change because of the axial tilt. “Plane of the ecliptic” in the diagram amounts to “plane of the orbit”. It’s called the ecliptic because it is on this plane that eclipses occur—but that’s better discussed in another (more relevant) thread.

The earth’s axis is tilted from the perpenicular—the diagram says 23.5°, but more accurately it is 23.44°, if I may pick that nit. While the tilt qua tilt does not make a difference in the distance to the sun (in fact it’s nigh nothing compared to the eccentricity of the planet’s orbit), what does happen is that the sunlight is more direct (with the sun riding high overhead at midday) in the hemisphere tilted toward the sun (northern hemisphere in the diagram), and so that hemisphere has summer, and the opposite hemisphere has winter. Half an orbit later the situation is reversed. Spring and autumn are the transition seasons.

HOPE MY ANSWER HELPS YOU...........
☺☺☺☺☺☺☺☺☺☺☺☺☺