Matching the types of cloth/fiber with their origin: a. Linen is a textile made from the fibers of the flax plant (Linum usitatissimum). This matches 2. Flax plant. b. Coir is a natural fiber extracted from the husk of coconut (Cocos nucifera). This matches 1. Coconut plant. c. Mohair is a fabric or yarn made from the fleece of the Angora goat. This matches 4. Angora goat. d. Down is a layer of fine feathers found underneath the tougher exterior feathers of ducks, geese, and other waterfowl. It is used for insulation in items like jackets and bedding. This matches 3. Feathers of duck and geese. Thus, the correct match is a-2, b-1, c-4, d-3.