Smoking is one sign of working-class membership. Teenagers smoke to rebel against middle-class values. Smoking is dangerous to the health. Women who diet all the time have let society define them. Ads show thin women as the ideal.
Many girls start to diet in elementary school.
It is more important to be healthy than thin. A. Topic sentences in paragraphs should be developed through examples, facts, life experiences, reasons, etc. Your readers probably do not share your opinions or experience, and will not understand if you only use abstract language. Your purpose is to convince the reader that what you are saying is true, so make the support as clear and vivid as it is to you. It is possible for students to harass teachers.