Why the other options are wrong:

• It is about the writer, Henry, and his achievements.: The first book describes Henry’s desire to write, rather than a list of achievements.
• It is one of the kinds of a flip book not produced ever.: The source does not claim the format has never been produced; it discusses existing flipbooks.
• It tells us about the Holocausts and the ill-effects.: The first book is about Henry’s wish to write; the Holocaust belongs to the broader project.

Correct Answer: Two distinct sets brought together back to back, upside down relative to each other.

Why this is correct: A flip book is described as two distinct sets of pages joined back to back, with the sets upside down relative to each other.

Why the other options are wrong:

• Two sets placed side by side in the same orientation.: The sets are joined back to back rather than placed side by side in the same orientation.
• Two sets placed one after another in the same orientation.: The sets are oppositely oriented rather than placed consecutively in the same orientation.
• Two sets consisting only of illustrations.: The definition concerns the arrangement of pages and does not say the pages consist only of illustrations.

Correct Answer: To look at the Holocaust from every conceivable angle.

Why this is correct: The writer wanted to view the Holocaust from every conceivable angle, which explains choosing the flipbook format.

Why the other options are wrong:

• To revisit books enjoyed in childhood.: The stated reason concerns the Holocaust rather than revisiting childhood books.
• To create decorative covers.: The stated motive is considering the Holocaust from different angles rather than decorative covers.
• To make the book easier to carry.: The source gives a thematic reason rather than ease of carrying the book.

Correct Answer: Many children's books are published as flip books.

Why this is correct: The conversation says a lot of children’s books are published as flipbooks. This supports many children’s books using that format.

Why the other options are wrong:

• Most of the books were written on the Holocausts.: The comment concerns the flipbook format rather than claiming most children’s books concern the Holocaust.
• Most of the books told about the momentous events.: The source does not say most children’s books describe momentous events; it comments on the format.
• Most of the children books were written illogically.: The comment concerns publishing format rather than judging most children’s books illogical.

Correct Answer: Because it is always half upside down when you hold it.

Why this is correct: The writer likes the symbolism of a book being half upside down when it is held. That is the physical feature the narrowed question asks about.

Why the other options are wrong:

• Because it is always written in a more sensible fashion.: The writer discusses orientation rather than claiming the writing is always more sensible.
• Because he is fond of reading flip books since childhood.: The source gives a symbolic reason rather than a childhood preference for this format.
• Because you cannot escape from reading the book.: The no-escape reading experience is another reason given, but it is not the physical orientation asked for here.

Correct Answer: His publishers hated his book.

Why this is correct: The story says Henry’s publishers hated the book and then Henry quits. Their rejection explains why he stops writing.

Why the other options are wrong:

• Because he was taking care of his boy and family.: The family-care account concerns the speaking author, rather than Henry’s stated reason for quitting.
• Because he was busy with his job in a chocolate shop.: The chocolate-shop work comes after Henry quits and does not explain the decision.
• Because he was baby-sitting and writing book for prime minister.: The family and correspondence details do not supply Henry’s reason; the story identifies rejection by the publishers.