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"Luck causes you to have money," said the mother. "If you're lucky you have money. That's why it's better to be born lucky than rich. If you're rich, you may lose your money. But if you're lucky, you will always get more money." (from "The Rocking-Horse Winner," by D.H. Lawrence)
The cause-and-effect relationship in this passage.
What is luck (the cause) that results in money (the effect)?