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In cold countries , in wingter, even whe...

In cold countries , in wingter, even when the water of lakes freezes, aquatic animals and plants can survive. How do you think it is possible? Explain in detail.

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(1) In cold countries , in winter, a layer of ice is formed on the surface of lakes when the atmospheric temperature falls below `0^(@0C `. However, below this layer, there is water at `4^(@)C ` . (2) Ice, being a bad conductor of heat, does not allow transfer of heat from this water to the atmosphere.Hence, aquatic animals can survive in this water.
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