Answer: In the life cycle of the silkworm the silkworm is killed at the stage of pupa because pupa is covered with silk and we kill silkworm to obtain silk fibres from them.
But in the fabric industry, silk is mass produced through the breeding and domestication of silkworms on what are essentially moth factory farms. When the caterpillars enter the pupa stage of their development, their cocoons are plunged into boiling water. This kills the silkworms and begins to unravel the longer fibers.
