What is one of the advantages of breastfeeding for infants?

One of the key advantages of breastfeeding for infants is that breast milk contains immune factors. This includes antibodies, particularly immunoglobulin A (IgA), which plays a crucial role in protecting the infant against infections. It contributes to the development of the infant's immune system by providing passive immunity, helping to shield them from illnesses such as respiratory infections and gastrointestinal diseases. Additionally, breast milk adapts to meet the changing needs of the growing infant, providing optimal nutrition and support for their health.

The other options highlight aspects that are not benefits of breastfeeding. For example, the assertion about a higher incidence of allergies typically contradicts research suggesting that breastfeeding may help in reducing the risk of certain allergies. Similarly, the idea that nutrients are harder to absorb is inaccurate; breast milk is specifically designed for optimal absorption by infants. Lastly, while formula feeding has been linked to an increased risk of diarrheal illnesses compared to breastfeeding, it is important to note that breastfeeding significantly reduces this risk due to the presence of immune-boosting factors.