The chemical used in breather is

asbestos fiber
silica sand
sodium chloride
silica gel

The correct answer is D. silica gel.

Silica gel is a type of desiccant, which means it absorbs moisture from the air. It is often used in breathers to prevent moisture from damaging electronic components.

Asbestos fiber is a type of mineral that is known to cause cancer. It is no longer used in breathers or any other products.

Silica sand is a type of sand that is made up of silica particles. It is often used in construction and other industrial applications.

Sodium chloride is a type of salt that is commonly known as table salt. It is not used in breathers.

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