Question

which nutritional class absorbs vitamins and sustains the immune system?
fats
water
proteins
carbohydrates

Explanation:

Fats (lipids) are the nutritional class that absorbs fat - soluble vitamins (such as vitamins A, D, E, and K). Proteins are essential for building and repairing tissues and are involved in many enzymatic and immune - related functions (antibodies are proteins). Carbohydrates are the body's main source of energy. Water is crucial for many physiological processes but does not absorb vitamins in the way fats do.

Answer:

proteins