Final answer:
Freud would postulate that Mary's counseling is related to the phallic stage of psychosexual development.
Step-by-step explanation:
Freud would postulate that Mary's counseling is related to the phallic stage of psychosexual development. This stage, which occurs between the ages of 3 and 6, is when children become aware of their bodies and recognize the differences between boys and girls. In this stage, children may experience conflict due to their desire for the opposite-sex parent and feelings of jealousy and hatred towards the same-sex parent. Resolving this conflict is important for healthy development during this stage.