The property of water that is not critical to biological life is surface tension.
What is biological life?
Biological life means the life in which living organism do exist and for their survival they mainly depends on water and air.
The main critical properties that water should posses to biological life are density, temperature, cohesive force and adhesive force. Viscosity is also understand by the cohesive force because more attraction between atoms more viscous they are.
Hence option (1) is correct i.e. surface tension.
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