Final answer:
Infants who are fed cow's milk instead of breast milk or formula are at risk of developing iron-deficiency anemia.
Step-by-step explanation:
Infants who are fed cow's milk instead of breast milk or formula are at risk of developing iron-deficiency anemia. Cow's milk does not provide enough iron, which is essential for the production of red blood cells. Additionally, cow's milk contains proteins that are difficult for infants to digest, increasing the risk of iron deficiency.