Explanation:
One cycle of the moon phases last for almost around 29 and a half days or 29.5 days .
There are four phases of the moon .
The average number of days between 4 intermediate phases of moon is approximately 7.4 days , however between full , waning/waxing gibbous , waning / waxing crescent,and new moon is around 3.5 days .
Answer:
It happens because the consuming is higher than the water drop rate, or even because there are too many people in a zone where there is not enough fresh water.
