What elements make the diary of a young girl by anne frank a memoir?

The memoirist, Anne Frank, discusses factual events that influence her life.

The work doesn’t discuss Frank’s entire life, but focuses on a single past experience—the events of hiding from the Nazis.

Frank reflects on the significance of these events.

Unlike a historical text or a news report, the story includes personal details.  

Frank describes her relationships with other people sharing the experience.

Frank describes her world in a way that makes it come alive for readers.

with? ?

explanation:

21 balloons is the story of professor william sherman's travels.

in 1883, he set off from san francisco for a balloon ride over the pacific and was found a month later floating with 21 balloons in the atlantic ocean. this seemed an astounding feat and everyone wanted to know what had happened.    

professor sherman was loyal, however, and said he would tell his tale first to the western american explorers club in san francisco, of which he was a member. this built up suspense for several chapters before he began to tell of the wonders of his adventures and the amazing island of krakatoa, an island which had just been blown up by a volcano.  

the residents of krakatoa are all millionaires who live under a "gourmet government" of their own devising. we get to see all the incredible adventures that creative people with unlimited resources would create according to the author.