Final answer:
Sesame oil is primarily composed of monounsaturated and polyunsaturated fats, with oleic acid being the predominant fatty acid.
Step-by-step explanation:
Sesame oil is predominantly made up of unsaturated fats, specifically, it is rich in monounsaturated fatty acids. The primary monounsaturated fatty acid in sesame oil is oleic acid. Additionally, sesame oil contains polyunsaturated fatty acids, including linoleic acid, which are essential for human health. These fatty acids are structured as triglycerides, which are esters made from glycerol and fatty acid molecules. Triglycerides that have one or more carbon-carbon double bonds are considered unsaturated, and since sesame oil is liquid at room temperature, it is characterized as an oil rather than a solid fat.