Answer: Phases
Explanation:
The moon seems to change shape from day to day in a cycle that lasts about a month as it goes through the phases. As a result of this the moon appears in various shapes throughout the month.
The waxing crescent, new moon, full moon,waning gibbous are some of the stages of moon.
Its shape changes from time to time that is because of which it appears in variety of shapes throughout the month.
