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.
A down comforter resembles a thick, fluffy quilt, but is filled with down feathers from geese or duck. Down is extraordinarily light, soft, warm and luxurious, making a comforter filled with it an exceptionally popular bed covering. Most feathers lay flat with a central quill, but true down lacks a hard shaft and the fluffy filaments are bushy in appearance. This is what makes down so soft.