Question

how can we live without water for 5 days and how can we do without food for 15 days​

Answer 1

because there are some essential biomolecules in water which keep us alive in water there is hydrogen and oxygen which is essential but in food there is also essential biomolecules but our body make some biomolecules too

also there is a simple answer also that our body store food also in form of starch but body can't store water like camels