Which term refers to sections of cities where a specific ethnic group, particularly Jews, was historically forced to live?

The term that refers to sections of cities where specific ethnic groups, particularly Jews, were historically forced to live is indeed "ghetto." Historically, ghettos emerged in medieval Europe as designated areas where Jews were restricted and segregated from the rest of the population, often resulting in overcrowded and impoverished living conditions. This practice was institutionalized through various laws and societal norms that aimed to isolate Jewish communities.

In contrast, an enclave refers to a geographical area where one ethnic group is surrounded by another but does not necessarily imply a historical context of forceful segregation. Brain drain refers to the emigration of highly trained or qualified individuals from a particular country or region, and urbanization describes the increasing population and development of urban areas. Neither of these terms relates directly to the forced settlement of specific ethnic groups within urban settings.