
Starting with with arrow A . The sun sucks up water. This is called evaporation where the water change to a gas called water vapour.
Next, the water vapour in the air turns back into water or liquid when the temperature is very cold. And so clouds are formed. See Arrow B
Next, arrow C shows that how rain falls on land or sea."Precipitation occurs when so much water has condensed that the air cannot hold it anymore. The clouds get heavy and water falls back to the earth in the form of rain, hail, sleet or snow."
All the rain will collect in the river, lake and sea.