Final answer:
Santiago reacts to Flora's rage with understanding and patience, bearing the brunt of her anger and offering emotional support as she transitions from fiery passion to despair.
Step-by-step explanation:
How Santiago reacts to Flora's rage is depicted with a sense of endurance and empathy. Santiago endures Flora's anger, which has been accumulated not just from his deceit but also from her feelings of betrayal by religion and life itself. He withstands her passionate fury that, although intense, burns out quickly, leaving her weak and in despair. Santiago supports her emotionally through this tumultuous period, as she transitions from strong anger to despair, ultimately needing physical support as her energy is spent.