Mark and Luke are twin brothers. Mark is getting an A in math; Luke is getting a C. Luke thinks, "There is no point in trying, Mark is just better at math than me." Which of these statements is true? Mark was just born smarter than Luke in math.
If Luke tries harder on assignments, he will probably keep failing.
Mark should be tutoring Luke in math.
Luke can get better at math if he challenges his brain to practice.

Americans often speak of their country as one of several large regions.  these regions are cultural units rather than governmental units --  formed by history and geography and shaped by the economics, literature and folkways that all the parts of a region share. what makes one region different from another? a region's multicultural heritage as well as distinct demographic characteristics like age and occupation make regions different and special. within several regions, language is used differently and there are strong dialects. there are also differences in outlook and attitude based on geography.