The correct answer is: D. Silicon
Silicon is a chemical element with the symbol Si and atomic number 14. It is a metalloid: a semiconductor with a resistivity between that of metals and insulators. Silicon is the second most abundant element in the Earth’s crust, after oxygen. It is the main component of sand, quartz, and silicon dioxide. Silicon is also found in many minerals, including amethyst, carnelian, and jasper.
Silicon is used in a wide variety of products, including electronics, construction materials, and cosmetics. In beauty parlours, silicon is used in hair setting products to help hold the hair in place. Silicon is also used in hair styling products to help protect the hair from heat damage.
Chlorine is a chemical element with the symbol Cl and atomic number 17. It is a pale yellow-green gas at standard temperature and pressure and exists as a diatomic molecule. Chlorine is an extremely reactive element and is the second most abundant halogen. It is used in a wide variety of products, including bleach, disinfectants, and pesticides.
Sulphur is a chemical element with the symbol S and atomic number 16. It is a non-metallic, multivalent, and lustrous pale yellow solid at standard temperature and pressure. Sulphur is abundant in the Earth’s crust, as sulfide and sulfate minerals. It is also found in native form as elemental sulfur. Sulphur is used in a wide variety of products, including sulfuric acid, gunpowder, and matches.
Phosphorus is a chemical element with the symbol P and atomic number 15. It is a non-metallic, tetravalent, and lustrous white or yellow solid at standard temperature and pressure. Phosphorus is abundant in the Earth’s crust, as phosphate minerals. It is also found in native form as elemental phosphorus. Phosphorus is used in a wide variety of products, including fertilizers, pesticides, and matches.
Silicon is the correct answer because it is used in hair setting products to help hold the hair in place.