Suitable title: 'Leela's Method of Purifying Water' or 'Intelligent Water Purification'.

Completed story: Leela was working in the farm with her father when she realised that they left their drinking water at home. Before her father felt thirsty, she went to the nearby pond to fetch some water.

After obtaining some water in the container, she noticed that the water was muddy and unfit for drinking. To purify the water, she kept it for some time and then she filtered the muddy water using a piece of muslin cloth.

Leela, then, boiled the water for about 10 minutes in a covered pan. After boiling, she filtered it again and made it fit for drinking. She served this water to her father while having food, who blessed her and appreciated her efforts.

The chapter describes multiple methods for purifying water: sedimentation (keeping water undisturbed so heavy particles settle), filtration (using cloth or filter paper), and boiling.

Leela used sedimentation to let mud settle, filtration through muslin cloth to remove particles, and boiling to kill germs. The chapter mentions that people of ancient times used cloth with small pores as filters, and that boiling makes water safe for drinking.