Final answer:
Emotional language is the key detail that might lead a reader to feel sympathy for Azucena's predicament, as it connects on a personal and emotional level with the audience.
Step-by-step explanation:
If an author's purpose is to have the reader feel sympathy for a character's predicament, the most effective method would be the use of emotional language. This would entail describing the character's situation and feelings with words that evoke a strong emotional response from the reader. Emotional language is designed to connect with the reader on a personal level and elicit empathy, making it more likely for the reader to feel sympathy for the character.
Among the options provided, emotional language is certainly the indicator that an author is trying to evoke sympathy. Chronological events simply lay out the timeline of the story without necessarily evoking emotion. An objective tone is generally neutral and does not tend to evoke empathy or sympathy. Lack of character development would impede the reader's ability to connect with the characters, thus making it a less likely tool for generating sympathy.