how the caterpillar makes silk thread?
Please refer the following link:-
https://www.meritnation.com/ask-answer/question/what-is-the-process-of-making-silk-from-silkworm/fibre-to-fabric/5757163
https://www.meritnation.com/ask-answer/question/what-is-the-process-of-making-silk-from-silkworm/fibre-to-fabric/5757163