Explain the difference between ethnicity and nationality in the united kingdom

Nationality is basically restricted to the constitute states (England, Wales, Northern Ireland, Scotland) and can also include a common, British nationality. It is more determined by where someone was born and raised.

Ethnicity can encompass background from other continents: for example, British English, Jamaican English - Ethnicity reflects people's family backgrounds

The correct answer is b

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.