Final answer:
Fats, triglycerides, waxes, and oils are all examples of (Option D) lipids, which are essential for energy storage, cell membrane structure, and nutrient absorption.
Step-by-step explanation:
Fats, also known as triglycerides, along with waxes and oils, are examples of lipids. Triglycerides are composed of glycerol combined with three fatty acid molecules. These molecules are important for storing energy, forming cell membranes, and serving as a dietary necessity for the absorption of fat-soluble vitamins. Given the options provided, the correct answer would be D) Lipids.