Final answer:
Serafina compares her troubled thoughts to a 'ship lost in the fog,' highlighting her feelings of confusion and yearning for clarity.
Step-by-step explanation:
When Serafina is worried or angry, she compares her thoughts to a ship lost in the fog, as this metaphor provides insight into her mental state. This comparison suggests that when Serafina is overcome by strong emotions, she feels disoriented and unable to see clearly, much like a ship navigating without visibility. The allegory captures the essence of being in a state of confusion and anxiety, seeking direction and clarity.