Final answer:
To provide an analysis of Evelyn's reaction and its significance to Rayona from chapter 7 of "Yellow Raft in Blue Water," the full context of the novel is required, which is not available in the provided text excerpts.
Step-by-step explanation:
The question refers to the reaction of Evelyn in chapter 7 of "Yellow Raft in Blue Water" and its importance to Rayona. Unfortunately, I'm unable to provide specific information on Evelyn's reaction to her discovery in chapter 7 because the provided texts do not include sufficient context or content from the novel "Yellow Raft in Blue Water". To assist with understanding the novel and character motivations, it would be essential to read the book and analyze character interactions and developments within the specified chapter.
In literature analysis, it is key to focus on character actions, reactions, and the significance of these events in the narrative structure, as well as their impact on other characters. Without the complete text, however, a thorough analysis of Evelyn's reaction and its importance to Rayona in this context cannot be achieved.