question_answer 6)

Compare the drainage system in your locality with that of the cities mentioned in the lesson What similarities and differences do you notice?  

Answer:

In our locality each house have good drainage system. There is underground drainage system with covered drams. The ancient cities had ring- well system. It is a rows of pots or ceramic rings arranged one on top of other. They have been used as toilet in some areas and as drains and garbage 'lumps. These ring wells have been found. in individual houses.