No it's not.
No, the phrase "drinking rain" is not a personification. It is describing the action of consuming rain as if it were a liquid. Personification involves attributing human characteristics to non-human things.
rain water
It falls as rain.
By drinking rain drops of the leaves
The rain
drinking water and rain water
No
most of the drinking water come from the rain and puts it in the ground and that's where your drinking water come from
We can make good use of rain water by storing rain water and by rain harvesting.
because it has less rain
Drinking in moderation can be good for you and drinking abusively can be bad for you.
We can make good use of rain water by storing rain water and by rain harvesting.