Final answer:
The themes in 'The Necklace' reflect on the expression 'What goes around comes around.'
Step-by-step explanation:
The expression that all of the themes in 'The Necklace' reflect on is 'What goes around comes around.' This means that the consequences of one's actions will eventually catch up to them. In the story, Mathilde's greed and dishonesty lead to her downfall, which serves as a perfect example of the theme 'What goes around comes around.'
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