Answer:
Ego-centrism.
Step-by-step explanation:
Adolescent egocentrism is the stage in which adolescent think they everyone around them is concerned about them only and that the "world revolves around them".
This theory of child development was developed by David Elkind. According to this theory, adolescents usually believe that they are important and that everyone just notices them only.
In the given case, Paris's behavior is an example of Adolescent egocentrism. Because she chose her outfit by having thoughts in mind that her outfit will be liked by others. This means that everyone else will just notice her and her outfit.
So, the correct answer is "adolescent egocentrism".