How does the reader know that this passage is written in the third-person limited point of view

You can tell a text is written in third-person if the author or narrator uses pronouns such as "he", "she", "they", "them" etc. to describe the characters. These pronouns are used when the subject is being spoken about. Now, third-person limited follows the same rules but it limits the point of view of the narrator. In third-person limited, the narrator can only know the thoughts and feelings of one character in the story. A good example of this can be found in the Harry Potter books, where the narrator refers to Harry Potter by his name or by "he", and where the narrator knows Harry's throughts and feelings, but doesn't know the thoughts or feelings of anyone else. "As Harry squelched along the deserted corridor he came across somebody who looked just as preoccupied as he was..."

That's how you know if a passage is written in third-person limited

the answer:

in the first part of the story running is all that matters to squeaky. running gives her confidence and defines who she is. at the beginning of the story she says that other kids call her mercury because she runs very fast. in the text she refers to herself as "miss quicksilver".

the line that provides the best evidence that squeaky has self-confidence is

" and i continue with my breathing exercise, strolling down broadway toward the ice cream man on 145th with not a care in the world cause i am miss quicksilver herself".

what did the protagonist say?