Final answer:
The best summary of 'A Brother's Surprise' is Option 2, which highlights the transformation and growth in the dynamic between two siblings on a family vacation.
Step-by-step explanation:
After reviewing several narratives and prompted scenarios, the best summary of "A Brother's Surprise" seems to be highly context-dependent and could resonate with varied experiences. However, based on the provided cues, such as a changed attitude towards a sibling, overcoming personal challenges, and gaining new perspectives, Option 2 seems to most accurately encapsulate the essence of the narrative: On a family vacation, one brother is humbled while the other gains new confidence. This summary suggests a transformation in the relationship dynamics within the family, aligning with the themes of personal growth, sibling relationship development, and the learning experiences that can emerge through shared experiences.