Explanation: The Earth's axis is inclined in relation to the ecliptic, i.e. in relation to the Earth's path when revolving around the Sun. The inclination or axis tilt is the angle, for which the vertical Earth's axis is inclined towards the ecliptic, which is about 23°, and consequently the different amounts of the Sunlight reach to different points on Earth during the year. In other words, this phenomenon causes a change in the seasons on Earth. This means that the change of seasons is not caused by changes in the distance between the Earth and the Sun during Earth's revolving around the Sun, i.e. during the year, because these changes in distance are extremely small, and their influence on the phenomenon of change of seasons is negligible.