"how to eat a poem": the poem is a fruit.

this is an example of which figure of speech?

metaphor
simile
personification
hyperbole

The given line "How to Eat a Poem" is an example of a hyperbole. Hyperbole is a figure of speech that uses exaggeration or overstatement for emphasis, but is not meant to be taken literally. Here, it is exaggerated that a poem can be eaten. But if you take it literally, poems should not be eaten. It is not a metaphor nor simile because no comparison is made. Neither personification because it human characteristics are not attributed to it.