Final answer:
Corn, soybean, safflower, and canola oils are included in commercial enteral formulas as sources of essential fatty acids linoleic and alpha-linolenic acid, which are vital for normal growth and must be included in the diet.
Step-by-step explanation:
The essential fatty acids linoleic acid (an omega-6 fatty acid) and alpha-linolenic acid (ALA, an omega-3 fatty acid) must be obtained through the diet, as the human body cannot synthesize them. These fatty acids are crucial for normal growth and development.
Vegetable oils such as corn oil, soybean oil, safflower oil, and canola oil are liquid at room temperature and have a higher proportion of unsaturated fatty acids, providing a good source of these essential fatty acids. Given this information, corn, soybean, safflower, and canola oils are included in commercial enteral formulas to provide a high supply of linoleic and alpha-linolenic acids. Therefore, the correct answer is option 2: Corn, soybean, safflower, and canola oils.