Final answer:
The hyperbole is "worked his fingers to the bone", highlighting Andrew's extreme effort for his family's betterment.
Step-by-step explanation:
The hyperbole in the passage can be found in the phrase "worked his fingers to the bone". This is an exaggerated statement that is not meant to be taken literally, but rather to emphasize the extent of Andrew's hard work and dedication to improving life for his family. Hyperboles are a common figure of speech in literature that expresses exaggeration for emphasis or effect.