Answer:
They help the reader visualize the characters' actions.
The semicolon is used in the text above, to cause an intermediate effect between the comma and the period. In this case, when he used a semicolon the author was indicating to the reader that it was necessary to pause, in reading, longer than the pause of a comma, but less long than the pause of a point. This is done because the sentence displays a partially complete thought, but it will present more arguments to be finalized.
In a more simplified way, we can say that the use of a semicolon in the text above was made to separate long coordinated sentences with the same syntactic function.
The question is about Hester and Ms. Walker who is her teacher.
Hester is a smart girl, she have new ideas to present and she walks towards Ms. Walker's desk . She wants to present her new idea to her but she is also nervous that she would forget the phrase in her mind that she keeps on repeating so she don't forget the phrase she have thought.
She is worried about forgetting her idea when she goes to Ms. Walker and she then hands over the letter about her new idea and when Ms. Walker accepts to consider her idea she is proud of her convincing letter.
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