Which of the following components are essential in the structure of hair?

The correct choice highlights key components that make up the structure of hair—specifically, proteins, lipids, and water.

Hair is primarily composed of a protein called keratin, which forms the structural framework of hair strands. This protein is crucial for providing strength and resilience to the hair, allowing it to withstand various external stressors.

Lipids serve an essential function as well, particularly in relation to the hair's health and appearance. They help in maintaining moisture levels and contribute to the overall texture and shine of the hair, providing a protective barrier against environmental damage and dehydration.

Water is another vital component, as it plays a significant role in maintaining hair's flexibility and overall health. Hair is made up of about 10-15% water; without it, hair can become dry, brittle, and prone to damage.

In contrast, other combinations suggest components that, while they may play roles in broader metabolic functions and health, are not critical structural elements of hair. Carbohydrates and vitamins may support hair health in indirect ways, while enzymes and sugars do not form part of the hair's structure. Similarly, while fatty acids and salts might influence hair care products or overall hair health, they are not essential constituents of the hair's structural makeup