Final answer:
Foreshadowing of change in Frantz's world is highlighted by his detachment from the current reality and consideration of critical decisions about his future, especially concerning his love for Bess. Grounded in literary analysis, this change is also paralleled in Chopin's depiction of Calixta's spiritual transcendence and redefinition of her societal role.
Step-by-step explanation:
The detail that foreshadows the central idea that Frantz's world is about to change can be found in the excerpt that describes how the character is contemplating his future and the decisions he must make. The indication of change is foreshadowed by the passage, "The world seems very far away," suggesting a detachment from his current life and the impending transformation. Additionally, there is a resurging reality that ironically intervenes, demanding action and contemplation regarding significant life decisions, particularly concerning his relationship with Bess. This foreshadowing is further supported by the literary analysis, pointing out that the character must address 'the forgotten truth concerning her' which poses a direct challenge to his happiness, indicating a transformative crossroads.
The literary critique also references Garrison's approach to Chopin's diction, which hints at major changes for the protagonist's world through the spiritual transcendence experienced by Calixta. The analysis suggests that the protagonist's behavior is being redefined, which parallels the transformative journey that Frantz is on. The ability of the critiques to connect textual evidence with the thematic elements of the story indicates a well-structured understanding of the text's foreshadowing techniques.