How did Jews hide?

Hitler was going around killing Jews, so to save themselves from getting killed, they had to hide.They also hid long enough to migrate to other, safer parts of the country.

Because the Germans were after the Jews and they wanted to kill them all. so they tried to hide.

probably but there is no way you can find out without finding a Jew who hid underground or someone who knew someone who did

some simply physically hid, like Anne Frank (et al). Others hid by pretending to be aryan, either by forging papers or by getting paper with false information.

because the Holocaust was all about the persecution of the Jews