Reason for the Cycle of the Season
The cycle of the season is caused by the Earth's movement in relation to the Sun. This movement results in changes in the angle and intensity of sunlight reaching different parts of the Earth, leading to the four distinct seasons we experience.

Rotation vs. Revolution
- Rotation: The Earth rotates on its axis, which is an imaginary line passing through the North and South Poles. This rotation is responsible for the day and night cycle we observe.
- Revolution: The Earth revolves around the Sun in an elliptical orbit. This revolution takes approximately 365.25 days to complete, resulting in the changing of seasons.

Gravitation's Role
- The force of gravity between the Earth and the Sun keeps the Earth in its orbit. This gravitational force also influences the Earth's tilt, which is approximately 23.5 degrees.
- The tilt of the Earth's axis is crucial for the cycle of the season. As the Earth orbits the Sun, different parts of the Earth receive varying amounts of sunlight, leading to the seasons.
In conclusion, the cycle of the season is primarily caused by the Earth's revolution around the Sun and its axial tilt. These factors, along with the force of gravity, determine the distribution of sunlight on Earth, resulting in the distinct seasons we experience throughout the year.

B. Revolution