The most suitable response to the question regarding the effect of the author's use of figurative language in this passage is:
It emphasizes how important being brave is to characters in this cultural setting.
The passage illustrates bravery through the actions and words of the old woman who steps up to confront the yamanba, contrasting her courage with the fear exhibited by the two young men who choose to abandon the mission. This highlights the value placed on bravery in the cultural context of the story.