Read this excerpt from a book. This book looks at the pros and cons of homeschooling from both a student and a teacher perspective. It is meant to be used to inform readers—parents, students, teachers, administrators—so that conclusions can be drawn and decisions can be made about opinions for teaching, learning, performance, and personal growth. How does the author use advantages and disadvantages to guide reader understanding? by providing a definition of "homeschooling" by providing examples of different types of schools by providing the author's opinion about homeschooling by providing the reader with a summary of the book's purpose

The author uses advantages and disadvantages to guide reader understanding by providing the reader with a summary of the book's purpose

Explanation:

This excerpt from the book gives a brief summary of the elements that are presented in the written material to guide the reader towards their own inferences about homeschooling by taking the positive and negative points of view of it from the teachers' side as well as the students' side and leading to a wider vision of the topic and its final understanding.

"the day we found the sharks' teeth" i would say highlight the element of the plot as it sets its boundaries and centers the adventures of them being on a boat and cleaning spit of sand.

it is the background information on the characters and setting explained at the beginning of the story. the exposition will often have information about events that happened before the story began. the exposition is often the very first part of the plot.