Final answer:
Maris's self-centered behavior and pursuit of immediate gratification are most strongly influenced by her id, according to Freud's psychoanalytic theory.
Step-by-step explanation:
According to Freud's psychoanalytic theory, Maris's behavior, which is very self-centered and seeks immediate gratification, is most strongly driven by her id. The id operates on the pleasure principle, which seeks immediate gratification of all desires, wants, and needs. If these needs are not satisfied immediately, the result is a state of anxiety or tension. The id is present from birth and is the source of bodily needs, wants, desires, and impulses, particularly our sexual and aggressive drives.
The superego is the aspect of personality that holds all of our internalized moral standards and ideals that we acquire from both parents and society—our sense of right and wrong. In contrast, the ego is the 'executive' part of personality that deals with reality, trying to meet the desires of the id in a way that is socially acceptable. Given the description of Maris's behavior, it is the id, not the superego or the ego, that is most dominant in dictating her actions for immediate pleasure.