Which figure of speech is used in this text?

Noah remarked that the new book on anti-gravity was impossible to put down.

(1 point)
Responses

metaphor
metaphor

simile
simile

pun
pun

hyperbole

1 answer

The figure of speech used in the text is a pun. The phrase "impossible to put down" plays on the double meaning of "anti-gravity" suggesting both the book's engaging content and the literal idea of not being able to put something down because it defies gravity.