a natural fiber
Natural. It is the fiber made by the silkworm to surround the cocoon of the silk worm larva.
silk
The superlative for costly is "most costly" or "costliest."
It is a natural fiber made from maggots.
Silk, rayon and wool are all fibres.
cotton is a natural fiber where as silk is not
no disadvantages
lipid
nope
Silk is the only natural fiber classified as a filament fiber. It is produced by silkworms and consists of long, continuous strands that can be woven into luxurious fabric.
Rayon is a semi-synthetic fiber made from natural cellulose materials, while silk is a natural protein fiber produced by silkworms. Rayon can be manufactured to resemble the smooth texture of silk, making it a popular and more affordable alternative to silk fabrics.