How does Sophie display her bravery in chapter 15 of the novel the chrysalids?

In chapter 15 of "The Chrysalids," Sophie displays her bravery by risking her life to save Rosalind and the others from the spider-like creatures. She shows quick thinking and courage in the face of danger, ultimately sacrificing herself to protect her friends. Her actions demonstrate her selflessness and determination to help others, even at great personal cost.