Why did the frank family go to holland and why did they go into hiding?

The Frank family moved to Holland in 1933 to escape the increasing persecution of Jews in Germany under the Nazi regime. They went into hiding in July 1942 to avoid being deported to concentration camps, as the Nazis intensified their efforts to round up Jews in occupied territories. They sought refuge in a secret annex behind Otto Frank's business, where they lived concealed for over two years until their discovery in August 1944.