Advertising negatively?

ok, i need an "essay", really only five paragraphs on advertising negatively, which include the intro and conclusion. I would prefer one paragraph on adolescents body image and one on how advertising affects women in a negative way. This "essay" is on adolescents (basically the people i'm talking about) its a grade 7 one so not that fancy, and ill like to have a bibliography and footnotes with it. its part of the grade. please help me even with one paragraph, it would help a lot! Thank you so much!