What type of motion is the rising and setting of the sun?

The rising and setting of the sun is primarily due to the Earth's rotation on its axis. As the Earth rotates from west to east, different parts of the planet are illuminated by the sun, creating the appearance of the sun rising in the east and setting in the west. This motion is a daily cyclical phenomenon, influenced by the Earth's axial tilt and orbit around the sun, leading to variations in sunrise and sunset times throughout the year.