Identify the structure indicated by the number 4 in the figure below. 
Definitions:
Defense Mechanism
Psychological strategies used unconsciously to protect oneself from anxiety arising from unacceptable thoughts or feelings.
Projection
A defense mechanism in psychology where individuals attribute their own unacceptable thoughts, feelings, and motives to another person.
Queer
A term used in the context of gender and sexuality that can denote identities that are not exclusively homosexual or heterosexual, or normative gender expressions.
Orally Fixated Person
An individual who retains an infantile tendency to focus on oral activities, such as eating or talking, as identified in psychoanalytic theory.
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