According to the passage about Mithi Wala, what is spread inside the tanks to keep the water fresh?
Read the passage: The Thar desert village of Mithi Wala has no river, so its people depend on rainwater. Each household has a covered underground tank called a tanka, which collects rain from the roof during the brief monsoon. The tanks are cleaned every spring by groups of neighbours working together, and a thin layer of lime is spread inside to keep the water fresh. Elders teach children never to waste even a cupful, and washing water is reused to irrigate small vegetable patches. Visitors are often surprised that such a dry place can grow fresh green chillies.
Correct answer D. A thin layer of lime
The passage states that the tanks are cleaned every spring and that a thin layer of lime is spread inside to keep the water fresh.
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