Answer:
''Water is life so don't waste it.''
Step-by-step explanation:
The theme of the poster is ''Water is life so don't waste it.'' which is used to creates awareness in the people for wasting water. Water is life because without water no organism will be able to survive in this world and by wasting water the reserves of clean water reduces and water crises will be generated if we continuously wasting this water. So we can say that water is life and life should be used in an efficient way not to be wasted.