Fats are essential for the absorption of fat-soluble vitamins A, D, E, and K, which are crucial for a well-functioning immune system. Certain types of fats also enhance immune function and reduce inflammation, supporting overall health. Thus, fats are the nutritional class that absorbs vitamins and sustains the immune system. ;
The nutritional class that absorbs vitamins and supports the immune system is fats, which are essential for the absorption of fat-soluble vitamins A, D, E, and K. Certain healthy fats, like omega-3 fatty acids, also enhance immune function. Therefore, the correct answer is A. fats.
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