Questions to research: are advertisements aimed at teenagers effective? and, are they ethical? i need a body paragraph

There are several advertisements aimed at teenagers.In my experience I would say that most of them are decidely  effective.

Think of clothing , for instance.Casual clothes and mainly denim designs are attractive for all teenagers.Most ads show popular and good looking  teens having a great time together while wearning America´s favourite brand; Levi´s.

Won´t teens be looking forward to taking up a sport just to wear a pair of Nike trainers for running?The commercials show successful sportspeople in them all the time.It is not surprising they are sold all around the planet.

Whether the advertisements are ethical or not depends on what it is consedered ethical in advertising.In other words, if the young are going to insist in having something just because it is popular, and in addition parents will feel it is an obligation to buy the product , the ad is unethical. It is not correct to make the young, just because they are inexperienced , strongly believe  that something is a must to have.The only ones who benefit from selling are the business people who sell the products advertised.

Teens see, teens want and advertisers know that.They create ads to catch teenagers´  interest in having those products that make them feel they are on top of the world.

wheres the passage with the idiom underlined