Stages in the lifecycle of silkworm are given below. Write them in sequential order: pupa, silkworm, egg, silk moth.

c) Silk moth → egg → silkworm → pupa

Silk is a natural fibre and was amongst the earliest fibres discovered by man with others being wool, hemp, linen and cotton. The life cycle of silk moth starts when a female silk moth lays eggs. The caterpillar or larvae are hatched from the eggs of the silk moth. The silkworms feed on mulberry leaves and give rise to pupa. In the pupa stage, a weave is netted around by the silkworm to hold itself. After that, it swings its head, spinning a fibre made of a protein and becomes a silk fibre. Several caterpillars form a protective layer around pupa and this covering is known as the cocoon.

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