(a) Eggs of silk moth on mulberry leaf: Silk moth has laid eggs on mulberry leaf from which caterpillar/ silkworm will come out and will feed on mulberry leaf.

(b) Silkworm: Silk moth lays eggs from which larvae come out. These are called caterpillars/ silkworms.

(c) Cocoon: silkworms completely cover themselves with silk fibre. This covering is called cocoon from which silk fibre is obtained.

(d) Cocoon with developing moth: Moth starts developing inside cocoon. When cocoon is boiled/ exposed to steam to separate silk fibres, the moths present inside are killed.