When a newborn infant is touched on the cheek, the infant will turn its head toward the source of stimulation. This behavior is known as

This behavior is known as the rooting reflex. The rooting reflex is an automatic response found in newborns and is essential for breastfeeding. When a newborn's cheek or mouth is stroked or touched, it stimulates the infant to turn toward the source of the touch, which helps them to find the nipple. This reflex plays a crucial role in ensuring that the infant can receive nourishment and is a part of their instinctive behaviors. The rooting reflex generally fades by the time the baby is 4 to 6 months old, as they begin to develop more voluntary control over their movements. It's one of several reflexes, including the sucking reflex, that are vital for the survival and development of infants.