1. Teenagers want to change their appearance because sudden changes during puberty make them uncomfortable.

2. If you're a girl, you may gain weight and when you're a boy, your shoulders may get wider and your voice may get deeper.

3. Media images are idealised and unrealistic, so they make teenagers insecure about themselves.

4. (Odpowiedź indywidualna, przykładowo:)

 - I agree with the author of the text. The most important thing is feeling comfortable with your own body and not minding idealised beauty standards promoted in media.

 - I don't agree with the author of the text. While I agree that some beauty standards are pure fantasy, I think changing your image through workout and diet is not a bad thing.