Answer:
Pun
Explanation:
Health in this sentence is supposed to sound like "hell" in the expression "for the hell of it." This makes health a pun, or wordplay.
Churchill's matter-of-fact delivery makes it seem as though he is disinterested in the subject <span />
Answer:
to be creative
to make people curious about the topic
to introduce the topic of the book
to address what people might think a black hole is
to point out that the book will talk about what a black hole is not
to play with words
