The silkworm is (a) a caterpillar (b) a larva
The silkworm is the larva ( the active immature form of an insect)or caterpillar of the Bombyx mori moth. Silk has been made for at least 5000 years in China. The moth is important because it makes silk. The caterpillar or larvae are hatched from the eggs of the silk moth.
