Infants need fat because it aids in absorption of several vitamins and also helps the to develop. a. kidneys.
b. nervous system.
c. reproductive system.
d. skin.

b. nervous system.

Explanation:

Fat is essential for neurological development and brain function in infants, that is fat is essential for nervous system development in infants.

According to Fidler in article published in 1998,  40% to 50% of infant energy are obtained as fat from their Mother's breast milk and infant formula. This fat is essential in building nerve cells.

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answer(b) keep oxygenated and deoxygenated blood separate;