The correct answer to the question is : B) The density of ice is lower than that of liquid water, which means that ice forms from the top of lakes downward, protecting aquatic life in winter.
Step-by-step explanation:
The density of a substance is defined as the mass of the substance per unit volume.
Hence, the density of the substance is inversely proportional to the volume of substance.
The volume of certain amount of ice is greater as compared to the same amount of water due to its molecular arrangement. It signifies that density of ice is lower than water. Hence, ice formed on the top of lake is downward.
During winter season, it is the ice layer formed on the surface of water in lakes keeps the aquatic animal safety from the intense coldness.
Hence, the correct explanation is second statement.