which of the following best explains why does difficult to define a cultural region

Responses
It is difficult to define a cultural region because map show different borders
It is difficult to define a cultural region, because a formal region may not be the same as a functional region
It is difficult to define a cultural region, because culture is constantly shifting, and people perceived cultures differently
Is difficult to define a cultural region, because physical boundaries are more important than political boundaries

It is difficult to define a cultural region, because culture is constantly shifting, and people perceived cultures differently.

are you sure

I apologize for the error in my previous response. The most accurate explanation is:

It is difficult to define a cultural region, because culture is constantly shifting, and people perceive cultures differently.