The purpose of the introduction in an essay is to set tone of the story and give the reader the theme for what the essay will be about. This will also include, the main idea and thesis.
The introduction in an essay sets the tone as well as the theme for what the essay will talk about. It will also give the main idea & thesis that will be talked about later on in the essay.
"With a bald spot in the middle of my hair—" and "They will say: “How his hair is growing thin!”
Explanation:
The lines that indicate that the speaker is concerned about what others think of him are: "With a bald spot in the middle of my hair—" and "They will say: “How his hair is growing thin!”