Question

what is the role of anamalous behaviour of waterin preserving aquatic life in regions of cold climate​

Answer 1

The anomalous behaviour of water is that from 0°C to 4°C it contracts and beyond 4°C it expands. ... This ice acts as an insulator and does not allow the temperature of the water layer below it to fall below 4°C. This ensures that a liveable temperature is maintained for aquatic life under the oceans and rivers.