Question

what would happen if water disappear from the earth

Answer 1

Life would end. Without water there would be no crops, animals (including humans) would dehydrate and die. There would be nothing to eat or drink. 
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Answer 2

if water will not there every thing will end .bcaz autotrophs make their food with the help of water ,sunlight ,CO2. in this case all organisms or heterotrophs   directly or indirectly depend on green plants for their foood .if water will not there green plants r unable to make their  foood also unable to provide anyone.. also humans will not get water to drink