Four different types of fibres are given to us. Out of these, two fibres (1 and 2) are obtained from plantsand other two (3 and 4) fibres are obtained from animals. Fibre (1) is used in
filling quilts and the yarn made of fibre (2) is used in making gunny bags. The yarn made
from fibre (3) is used for knitting sweaters and yarn of fibre (4) is used for weaving saries.
Name the four given fibres marked 1,2, 3 and 4.