May I know the explanation/reason why the correct answer is D?

 D

Explanation:

The high surface tension of water means that the water can resist extreme force due to its hydrogen bonding. This is NOT NEEDED for the fish to survive since the fish is likely living further below the surface.Water's high latent heat of vaporization means that much energy is needed to convert water from its liquid to its gaseous state. Therefore, water can act as a coolant by absorbing the heat from a body of water and remove it when it evaporates. This is also NOT NEEDED for the fish to survive. Water has the highest specific heat capacity (NEEDED) of any liquid. Specific heat is the amount of heat a substance must absorb or lose to change its temperature. As a result, it takes a long time to heat and importantly cool water. This helps the fish to survive since, despite the surface of the water being frozen, the water below the surface retains enough heat for the fish to remain alive.The maximum density of water being 4 ° C (NEEDED) while water freezes at 0 °C.  Therefore, ice is less dense than water. This means that the ice will float. This helps to prevent the water further down from the surface to remain liquid so the fish can survive.

Hope this helps!!