variety ve diversity arasındaki fark nedir?Sadece örnek cümleler vermekten çekinmeyin.

up until the last 20 years or so, you could say that they meant the same thing however they tend to be used differently now.

variety tends to be used to describe a set of objects/things that are similar in type but differ slightly from one to another:
e.g
'the mall has a variety of shops' - being that all shops are the same, in that they sell things, but of course what they sell varies.

diversity can still be used in that kind of setting but it has been adopted as a political word used to describe the ethnic, religious, racial, gender, sexual orientation (etc.) differences within a population of people. (and this is it's most common use now a days)

both words are also terms used in biology.