why water doesn't burn?

Question

since hydrogen burns and oxygen burns and these two are important to start the fire?

Answer 1

But water isn't just hydrogen or just oxygen. Its both in a certain proportion.

Sodium is highly reactive with water. Chlorine will kill you. Combine them and we put it on popcorn.

Molecules don't work like the elements that make them. They become a new substance with their own individual properties.

Answer 2

Burning is combination with oxygen. H2O is already combined with oxygen.

Oxygen does not burn, it supports combustion.

To start a fire you need oxygen, heat and fuel.