What type of figurative language is, "Could melt the mouth", "So southerners stayed quiet", and "They are home to each other" from the story Brown Girl Dreaming in part 1-2

Answer 1

They are home to each other

Metaphor. Both people, the mother and Grace, are not literal homes but their shared interest for the south makes them "homes"

could melt my mouth

imagery: you know its imagery because it paints a picture for you

so Southerners stay quiet

Metaphor: the previous stanzas said that southerner's method of talking is not talking at all. that phrase is not to be taken literally so you can deduce that this is neither.