Answer:
After the Nazis occupied Poland in 1939, they began segregating Jews in ghettos, usually in the most run-down area of a city. By mid-1941, nearly all Jews in occupied Poland had been forced into these overcrowded districts. In the Warsaw ghetto, by far the largest, 490,000 Jews and a few hundred Roma and Sinti (Gypsies) struggled to survive despite extreme hardship.
Step-by-step explanation: