The change in light around us occurs because

Directions: Read the following passage and answer the question that follows:

THE EARTH KEEPS TURNING

Days follow nights and nights follow days because the earth keeps turning from west to east. The light around us keeps on changing slowly through the day, as the sun’s place in sky moves from east to west. People love the moments when the light around us changes suddenly, as that makes everything look so different. When, the sun springs up and colours the clouds with its light, we call it a sunrise. A sunrise is a beautiful sight. When at the end of the day the sun goes down, evening falls with the moment of sunset. It is the beginning of night. Since the earth keeps on turning through the night without rest, the sun comes up with another day. However, in the old days, people believed that the earth stood still, while the sun went around the earth bringing day and night.