Answer: This behavior indicates that she has developed SELF-RECOGNITION.
Explanation: Self-recognition is defined as the state of being aware of oneself physically. It is the ability to persistently and consistently perceive their presence amongst other people, their own knowledge and abilities.
This is done using what is known as the mirror test developed in 1970 by psychologist Gordon Gallup Jr. as an attempt to determine whether an entity possesses the ability of visual self-recognition.