The Correct answer is Lipids. Explanation & Key Takeaways: • Lipids are compounds that are insoluble in water but are soluble in organic solvents such as ether and chloroform. • Lipids include fats and oils (triglycerides or triacylglycerols), fatty acids, phospholipids, and cholesterol. • Fats and oils are esters of glycerol and three fatty acids. • They are important in the diet as energy sources and as sources of essential fatty acids and fat-soluble vitamins, which tend to associate with fats. • They also contribute satiety, flavour, and palatability to the diet. Related Concepts: • Carbohydrates are naturally occurring sugars, starches, and fiber in food. • All carbohydrates are made up of sugar molecules. • Sugar molecules linked together form starches and fiber. • Good carbohydrates take longer to be broken down by the body and used for energy. • They are found in whole-grain bread and cereals, products made from whole wheat flour, vegetables, and fruits. • Bad carbohydrates refer to foods that contain refined carbohydrates with a low fiber amount, mainly white flour and sugar.