The correct answer is pupa. Explanation & Key Takeaways: • When the caterpillar is ready to enter the next stage of its life cycle called pupa, it first weaves a net to hold itself. • The life cycle of a silkworm is Egg­ > Caterpillar ­> Pupa­ > Adult. • The egg is the first and primary stage of the life cycle of Silkworm. • The egg is laid by a female moth and the egg is having the size of small dots. • More than 350 eggs are laid by a female moth at a time. • The eggs hatch in the springtime due to the warmth in the air. • This procedure takes place once a year. Related Concepts: • Silkworm arises after the eggs crack and they are hairy. • They feed on mulberry leaves and consume a large amount of these leaves for around thirty days. • The Silkworms spin a cocoon around themselves which protects them. • This cocoon is made up of a single thread of soil. • Cocoon appears as a small cotton ball. • The pupa is a motionless stage. • The last stage is when the Pupa changes into an adult moth. • The Silk was invented around 3500 BC in China. Image of Life Cycle of Silkworm: