Final answer:
The word 'beautiful' most clearly reveals the positive and optimistic tone of the passage from Margaret Frink's memoir.
Step-by-step explanation:
The word in the excerpt from Margaret Frink's memoir that most clearly reveals the tone of this passage is beautiful. The word 'beautiful' most clearly reveals the positive and optimistic tone of the passage from Margaret Frink's memoir.
This adjective describes the spring day and contributes to a positive and optimistic tone, which is further reinforced by the phrase, 'Our faces were now at last set westward,' indicating a sense of hopeful anticipation and forward movement.