What kind of literacy device is this ?

This is an example of figurative language. It is not a metaphor because the example is a description, not a comparison. Figurative is an antonym of literal, whereby figurative language is not a direct representation of the state or condition of the subject, rather it is an abstract expression of the subject.

It is not a metaphor because a metaphor says something is something else. Ex: "He is a toothpick."

It is not personification. Personification gives human like qualities to inanimate objects. Ex: The tunnel swollowed the car as it drove through."

It is a hyperbole....something that cannot be taken literally that has been exaggerated for emphasis.

It is a metaphor because it does not literally mean his feelings were written all over his face, but rather, that it was obvious.

Yup, it's a METAPHOR.

A metaphor is kind of like an expression that describes something but it never really happened.

In this case it means that he showed all of his feelings by his facial expression.

Figurative language? Imagery?

ps:

Metaphor: A direct relationship where one thing or idea substitutes for another.

i dont see how what you wrote is actually a metaphor...

That guy said personification, what a moron lol Anyway it's a metaphor.

i think its a hyperbole because its exaggerating the statement, u cant really see his feeling written so yeah it ciuld be a hyperbole

metaphor

metaphor

metaphor.