Question

What happend when the silk caterpillar stops feeding?

Answer 1

then there will be no caterpiller and no silk

Answer 2

Answer:

When the silk caterpillar stops feeding its salivary gland starts secreting a sticky fluid, a protein called fibroin. This fluid hardens on exposure to air and forms a long thread of silk. This thread gets wrapped around its body to form a ball like structure called cocoon.