Here's a breakdown:

* Earth's Rotation: The Earth spins on its axis, completing one full rotation approximately every 24 hours. This rotation is what causes day and night.

* Our Perspective: As the Earth rotates, we, as observers on its surface, perceive the sun as moving across the sky. However, the sun is actually stationary, and it's our perspective that is changing.

* East to West: From our perspective, the sun appears to rise in the east and set in the west. This is because the Earth rotates from west to east. As the Earth spins, it brings us into a position where the sun seems to be above us (daytime) and then away from us (nighttime).

Important Note: The sun's apparent movement is not perfectly uniform throughout the year. The angle of the sun's path across the sky changes due to the tilt of the Earth's axis and its orbit around the sun. This is what leads to the different lengths of days and nights throughout the year, as well as the seasons.