Is the conversion of mulberry into silk a chemical change?

The conversion of mulberry leaves into silk is not a chemical change; rather, it is a biological process involving silkworms that digest the leaves and produce silk through their cocoons. The transformation from leaf to silk involves physical changes and biological processes, but the chemical structure of the silk proteins is produced by the silkworms from the nutrients in the mulberry leaves. Therefore, while the process involves living organisms and results in a different product, it does not involve a chemical transformation of the original material itself.