Question

what is a cocoon? of what is it formed​

Answer 1

a cocoon is formed by the worm which eats mulberry leaves and after eating it forms a cocoon

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Answer 2

Hey mate ,

A cocoon is a covering of silky threads that the larvae of moths and other insects make for themselves before they grow into adults.

Cocoons and chrysalides are protective coverings for the pupa. The pupa is the intermediate stage between the larva and adult. A moth makes a cocoon, which is wrapped in a silk covering. A butterfly makes a chrysalis, which is hard, smooth and has no silk covering .

   

Hope it helps