What is a well-known ghetto during The Holocaust?

The Warsaw Ghetto was a well-known and largest ghetto during the Holocaust.

Explanation:

It held 400,000 to 500,000, a major factor in this was the population of Jews. Poland had about 3 million Jews, 9.5% of the pre-War Jewish population.

most people now work in jobs where they do one  kind  of work; they are carpenters, bankers, cooks, mechanics, and so forth. likewise, most  businesses produce  only certainkinds  of  goods  or  services, such as cars, tacos, or gardening  services. this feature of  production  is known as specialization.