Answer:
Imaginary Audience
Step-by-step explanation:
The imaginary audience can be defined as away in which a person always imagine and believe that people are either looking or listening to him/her.
This type of people are often conscious of their self especially when they are around
people or group of friends.
Although this often happen when such person is in his/her young adolescence stage.
Therefore Mary's behavior exhibits IMAGINARY AUDIENCE because she always imagine that poeple are watching her or looking at her due to the small pimples on cheeks.