Click here to open the question paper O n a lone winter morning I was walking in the park and I saw a beautiful dew drop on a leaf. It was shining like a pearl, I went towards it to touch it . S uddenly I heard a voice 'Hi'. I got a bit scared and ask ed who is it, I got a reply “ Hi , I am water your best friend ” . I said “W ater my best friend but my best friend is Shriya , Who are you”? “ I don't know you , how can you be my best friend ” . He said I am not only your best friend . In Fact I am everyone's best friend, you want to know how. I said “S ure. ” Then the drop said “D o you know humans can survive without food even for a week but cannot survive without me for more than 3 days. "I am the basic necessity for the survival of all life forms on Earth. I am a unique source of life and I am very important for the continuation of life on Earth"." Oh that is all fine, but I am still not sure about...