The correct answer is option 1: Proteins and amino acids.

Henna is a plant dye that is commonly used to impart an orange-red color to the skin and hair. This color is achieved through a chemical reaction between the compounds in henna and proteins and amino acids present in the skin and hair.

Proteins and amino acids are organic compounds that are found in abundance in the body. They play a critical role in the structure and function of various tissues and organs. When henna comes into contact with proteins and amino acids, a chemical reaction occurs, resulting in the release of pigments that create the characteristic orange-red color.

Option 2, lipids, refers to another class of organic compounds that include fats and oils. While lipids are essential for the body, henna does not react with lipids to produce its color.

Option 3, carbohydrates, are compounds that provide energy to the body. Similar to lipids, henna does not react with carbohydrates to produce its color.

Option 4, nucleic acids, are biomolecules that carry genetic information within cells. Henna does not react with nucleic acids to create its color.

In conclusion, henna imparts its orange-red color to the skin and hair through a reaction with proteins