The seasons on Earth are created by the

Atilt of Earth on its axis, and the revolution of Earth around the sun.
Bgravitational pull of the galaxy and dwarf planets.
Clocation of Earth's hemispheres, separated by the Equator.
Dlocation of Earth's moon and its gravitational pull.

Verified Answer :

The seasons on Earth are created by the tilt of Earth on its axis, and the revolution of Earth around the sun. The planet Earth has a tilt of 23.5 degrees relative to the "ecliptic plane" (which is the imaginary surface made around the path around the sun)