Answer:
The main property of water which makes it unique is moulding. changing its texture depends on the surrounding like shape, temperature, colour, etc...
Step-by-step explanation:
In the following characteristic both physical and chemical reason can be seen for water to have such characteristic.
For a better example, we can take the process of turning water into Ice. In the process if there is a condition where the temperature is zero degree Celsius then water starts turning into ice, solid form.
This is the reason why water has a unique property. The quality which water has and makes it more unique because it can turn into solid form.