What term refers to the electoral district represented by an elected individual?

The correct term for the electoral district represented by an elected individual is "riding." In the context of Canadian political terminology, a riding is a geographical area that has been designated for the purpose of electing a member of the legislative assembly (MLA) or a member of Parliament (MP) in federal or provincial elections. Each riding has a defined boundary and is home to a specific number of voters.

The use of "riding" reflects a historical context where these regions were often associated with rural or specific community boundaries. While "constituency" can also refer to more general electoral districts in some political systems, in Canada, "riding" is the term most commonly used in electoral discussions.

The choices of "constituency," "district," and "region" can refer to various forms of electoral or administrative divisions, but they do not encapsulate the specifically defined electoral district representing an elected individual in the same way "riding" does in Canadian politics.