Final answer:
The underlined idiom 'With patience and calm, even a burro can climb a palm' means that every story needs to have a point.
Step-by-step explanation:
The meaning of the underlined idiom in the excerpt is Every story needs to have a point. The phrase 'With patience and calm, even a burro can climb a palm' is a Dominican saying that the narrator's mother uses to suggest that there is a purpose or lesson to be learned from every situation or story. It implies that even seemingly insignificant things can have value and meaning.
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