Answer:
Step-by-step explanation:
The more you see something, the more normal it becomes.
Advertising about bodies you see everywhere, billboards, newspapers, catalogs, storefronts, ads on websites, literally everywhere. So you see it everywhere and if the advertisement uses the same looking model every time, lean, good proportions, pretty, etc. not the normal woman or male then that becomes the norm. To look like that, and things like proportions and the way you look you are born that way and you can't change so people start to think they are the flawed ones even though they are actually the normal ones, it messes with people's minds and it causes doubt within themselves for not looking like a supermodel. So naturally the more people see the advertisements with not a lot of representation of genders, ethnicity, different weights and body shapes, the more people will be insecure because they see the one picture everywhere and subconsciously it gets wired in there brain that, that is the right answer, the right way to look, even if every look is the good look.