Question

which fibre source is not exhaustible?why?

Answer 1

ALL SOURCES ARE EXHAUSTIBLE EXCEPT ALL NATURAL FIBERS

thank Q !

Answer 2

 natural fibers are only inexhaustible and all other than natural resources are exhaustible natural resources are inexhaustible because nature is inexhaustible and so fibers obtained from nature is also inexhaustible while all the other fibers which are made from chemical processes are exhaustible .
  i hope it helps ....................................^_^