Final answer:
Santiago meets Fatima in the Al-Fayoum oasis in 'The Alchemist'. This oasis is a pivotal location in the novel where Santiago learns about love and destiny.
Step-by-step explanation:
Santiago meets Fatima at c) In the Al-Fayoum oasis during his journey in the novel The Alchemist by Paulo Coelho. While searching for his personal legend, Santiago travels through different locations including the Saharan desert, where he eventually arrives at the Al-Fayoum oasis. Here, he encounters Fatima, a young woman from the desert, and they fall in love. The oasis serves as a significant setting for Santiago's personal growth and the deepening of his understanding about love and destiny.