Here's why:

* Angle of Incidence of Solar Radiation: This is the primary driver of seasons. As the Earth orbits the Sun, the angle at which sunlight strikes different parts of the planet changes throughout the year. When the angle is more direct (closer to 90 degrees), the sunlight is more concentrated, leading to warmer temperatures. This occurs during summer in a hemisphere. When the angle is more oblique (further from 90 degrees), the sunlight is spread out over a larger area, leading to cooler temperatures. This occurs during winter.

* Tilt of the Earth on its Axis: The Earth's axis is tilted at approximately 23.5 degrees. This tilt is responsible for the different lengths of daylight and the changing seasons.

* Revolution Around the Sun: The Earth's revolution around the Sun is the reason why we experience a year. As the Earth orbits, the angle of incidence of solar radiation changes, leading to the seasonal cycle.

* Distance Between the Earth and the Sun: While the Earth's orbit is slightly elliptical, the change in distance between the Earth and the Sun is not significant enough to cause the dramatic temperature changes associated with seasons. The Earth is actually closest to the Sun in January (perihelion) and farthest in July (aphelion).

Therefore, the distance between the Earth and the Sun has a negligible effect on the seasons.