Freud proposed that psychological development in childhood takes
place in the following stages (by order): oral, anaI, phallic,
latency, and genital.
The oral stage goes
from birth to eighteen months of age. The
main focus is pleasure seeking through the infant’s
mouth, they need to taste and suck. if not, the infant will be fixated
leading to adult habits such as smoking, thumb-sucking, over-eating, and
baiting nails.
The answer is oral stage.
