Final answer:
The metaphorical phrase in the given paragraph is "bedroom oasis," implying that Ella's room is a peaceful retreat like an oasis in a desert.
Step-by-step explanation:
The phrase from the paragraph that contains a metaphor is "bedroom oasis". A metaphor is a figure of speech that directly compares one thing to another for rhetorical effect. By referring to her bedroom as an oasis, the sentence suggests that Ella's room is a peaceful refuge or sanctuary, much like an oasis is a refuge in the desert.