Looking down at these things is like looking at the tangle of roots and branches of a mangrove swamp in an aerial photograph. Perhaps the Martian polar regions are hospitable places for some Martian life forms. Well, a plant-like life form might do very well there. It is probable that all three are present in this picture. Dry ice is nothing but pure carbon dioxide, and the Martian atmosphere has plenty of carbon dioxide, too.
Water ice is simply frozen water.
So the essential elements required for plant life are very much present on Mars. To be sure, there is the matter of the very low temperatures at the Martian poles. However, solutes can greatly lower the freezing point of a solution, including the fluids in living organisms. One of my correspondents pointed out to me that we truly do not know the colors that we are seeing in these photos. The narrow-angle shot is a big file.