Question

Why do seasons change

Answer 1

What kind of answer are you looking for?

Answer 2

Its because of the Earth's orientation in its axis as it rotates.

Answer 3

Yes, the axis is tilted at 23o with respect to the plane
of the orbit. In northern hemisphere during winter, this tilt
is away from the sun, in summer it is toward the sun, making the sun shine more directly n the northern half of the globe.