Byron's use of a "hall" to stand for a "house" is an example of O metaphor synecdoche o metonymy O personification

The answer is synecdoche.

Explanation:

"Later is the poem, the speaker will refer to the place he leaves as "my own good hall," or home. Here, "hall" is a figurative way of referring to him home. When a writer uses a part to refer to the whole, it is called a synecdoche."

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explanation:

and also the mystery girl it might be someone that she might know in her school

yes, no, maybe, so i honestly don't know best of luck