The general process that takes place at a sheep shearing shed is
(a) removal of fleece.
(b) separating hair of different textures.
(c) washing of sheep fibre to remove grease.
(d) rolling of sheep fibre into yarn.
Removal of fleece is called sheep shearing, separating hair of different textures is called sorting, washing wool to remove grease is called scouring and rolling of sheep fibre into yarn is called rolling.
Hence, (a) is the correct answer.