how are natural dyes connected with chemistry, biology, and physics??
please I need expert answer 

Dear student
Please find the solution to the asked query:

Dyes are natural or artificial chemicals which give required colour to an object. It is used in Pharmaceutical industry to provide colour to the medicines, textile industry to colour the clothes and food industry for artificial colouring of food stuffs.

natural dye extracted from lichens is dissolved in distilled water to obtain litmus solution. 

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Natural dyes are dyes or colorants derived from plants, invertebrates, or minerals. The majority of natural dyes are vegetable dyes from plant sources—roots, berries, bark, leaves, and wood—and other biological sources such as fungi.
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