Final answer:
The author of the news article might have included the personal story of Mariana Revilla to add a human element to the topic of migration.
Step-by-step explanation:
The author of the news article might have included the personal story of Mariana Revilla to add a human element to the topic of migration. By sharing a personal story, the author can evoke emotions and empathy from the readers, helping them connect on a deeper level with the issue being discussed.
Personal stories can also provide concrete examples and anecdotes that support the larger themes or arguments presented in the article. Including Mariana Revilla's story can make the article more relatable and impactful for the audience.