Which six nutrient does fiber belongs to?

Fiber is considered a type of carbohydrate, specifically a non-digestible polysaccharide. It is part of the broader category of macronutrients, which includes carbohydrates, proteins, and fats. While not classified as a vitamin or mineral, fiber plays a crucial role in digestive health and can be found in plant-based foods. Thus, it primarily belongs to the carbohydrate group of nutrients.