Confidence votes 210. Antigone is considered a tragic hero, because tragic heroes have several qualities: They are royal, they have a tragic flaw that leads to their downfall, they have an unhappy ending, and lastly the character is worthy of concern. First, Antigone is royalty. This is shown through her bloodline in several ways.
The down feathers of eider ducks provide insulation due to lack of barbules and ability to fluff. Infrared image of a goose, showing its insulating capacities. Down feather structure is important for insulating properties. Eiders insulate their arctic nests with down feathers. Click/tap images for attribution and license information.
The chicken feathers contains keratin which is like wool but the only difference is, the surface area of the feather is longer due to the diameter of the fiber as it is smaller. In this way, the fiber is able to absorb more as compared to the wool or as compared to the cellulose fibers.