How did anne franks diary survive?

Answer 1

Rescued from the annex by Miep Gies, and given to Otto upon his return.

Answer 2

Anne Frank's diary survived because Miep Gies, one of the helpers who was sheltering Anne's family, found the diary after the family was arrested and kept it safe. She decided to return it to Anne's father, Otto Frank, after the war ended. Otto Frank then published the diary, ensuring that Anne's words reached a wide audience and became an important historical document.