? also known as "whalebone," is a tough keratinous substance from the mouths of filter-feeding whales. In texture, it is comparable to modern plastics, and has long been used by Native Arctic peoples to make buckets, cups, and other containers, ice scoops, sled runners, fish line, lashing, and nets.
O a. Spruce root
O b. Baleen
O c. Argillite
O d. Sinew