How does the revolution of the earth around the sun contribute to the occurrence of the seasons?

Answer 1

The earth's revolution around the sun creates seasons because of the tilt of the earth's axis. If the earth rotated around a perfectly perpendicular axis with respect to it's orbit, we would have no seasons since all parts of the earth would receive the same amount of sunlight at all points in the earth's orbit, disregarding the fact that the earth's orbit is not perfectly circular. But because the earth's axis is tilted approximately 23 degrees, depending on where the earth is in it's orbit, different regions of the earth will receive different amounts of sunlight.

For example, during summer in the northern hemisphere, the earth's axis is tilted towards the sun and more sunlight falls on the northern hemisphere. Conversely, less light falls on the Southern Hemisphere and so that hemisphere experiences winter. When the earth's axis tilts away from the sun, the opposite happens and less sunlight falls on the northern hemisphere, producing winter there, with the opposite happening in the southern hemisphere.

Answer 2

No what simply causes seasons is the tilt of the earths Axis depending on how close earth is to the sun when it is tilting.