Why is it important for living things that ice is less dence than water?

Explanation:

Ice actually has a very different structure than liquid water, in that the molecules align themselves in a regular lattice rather than more randomly as in the liquid form. It happens that the lattice arrangement allows water molecules to be more spread out than in a liquid, and, thus, ice is less dense than water.

i think its c. amphipod

one centimetre is equal to 0.01 metres