Once, Paheli visited a tailor shop and brought home some cuttings of fabric to study their properties. She took two pieces and found that one of the pieces was shrinking when it was burnt with a candle. However the other did not shrink on burning. Can you help her to find out which of the two was cotton fabric and which silk fabric?
A protein can be found in silk. As a result, the cotton cloth did not shrink but the silk fabric did.