Yak, Camel, and Goat all yield wool.

The correct order in the processing of wool is = $Shearing - scouring - sorting - fiber spinning - fiber dying -  rolling$

Scouring,the term ‘scouring’ applies to the removal of impurities such as oils, wax, gums, soluble impurities and dirt commonly found in textile material to produce a hydrophilic and clean cloth.

Wool is obtained from fleece (hair) of sheep or yak.

The various steps for processing fibers into wool are as follows:

• Shearing: The fleece of the sheep along with a thin layer of skin is removed from its body.
• Scouring: The sheared skin with hair is thoroughly washed in tanks to remove grease, dust, and dirt.
• Sorting: The hairy skin is sent to a factory where the hair of different textures is separated or sorted.
• The small fluffy fibers, called burrs, are picked out from the hair.
• The fibers can be dyed in various colours, as the natural fleece of sheep and goats is black, brown or white.
• The fibers are straightened, combed and rolled into yarn.

$C$

Protein ,animal fibers  are natural fibers that consist largely of particular proteins. Instances are silk, hair/fur (including wool) and feathers. The animal fibres used most commonly both in the manufacturing world as well as by the hand spinners are wool from domestic sheep and silk.

Cellulose is found in plant product.

$C$, sheep shearing is the process by which the woolen fleece of a sheep is cut off. The person who removes the sheep's wool is called a shearer Typically each adult sheep is shorn once each year (a sheep may be said to have been "shorn" or "sheared", depending upon dialect). The annual shearing most often occurs in a shearing shed a facility especially designed to process often hundreds and sometimes more than $3,000$ sheep per day.

The process of sheep shearing shed is removal of $fleece$.

Although $sheeps$ are associated with the production of wool, there are certain $goats$ that produce wool fibre. Fibres such as Mohair from Angora goats, cashmere wool from many breeds of goats. $Llamas$ produce very soft and lanolin free wool. 

Sericulture, or silk farming, is the rearing of silkworms for the production of raw silk.

The uppermost layer of the skin is dead.

Occupational hazards are hazards experienced in the workplace. 

Silicosis is a form of occupational lung diseases a form of caused by inhalation of crystalline silica dust and is marked by inflammation and scarring in the form of nodular lesions in the upper lobes of the lungs.

Small fluffy fibres called $burrs$, are picked out from the hair.

Yarn, it is a long continuous length of interlocked fibres, suitable for use in the production of textiles,sewing, crocheting, knitting, weaving, embroidery and ropemaking. Thread of  is a type of yarn intended for sewing by hand or machine.

Fibre particle can deposit in the lungs. 

The process of Fibre making involves a lot of physical hazards such as physical injuries during the process, heat, noise, dust, etc.

The fleece of the sheep along with a thin layer of skin is removed from its body. This process is called shearing. Usually, hair are removed during the hot weather which enables the sheep to survive without their protective protective coat of hair.

All of these represent correct statement 

Yarn is made up from fibers.