Question

Why does the sun seem to change position in the sky?

Answer 1

Because the earth rotation, when we move around the sun for a whole 365 times then we will have passed 1 year.

Answer 2

The first major contributor to the Sun's apparent motion is the fact that Earth orbits the Sun while tilted on its axis. The Earth's axial tilt of approximately 23.5° ensures that observers at different locations will see the Sun reach higher-or-lower positions above the horizon throughout the year.

hope this helps ^^