Final answer:
In 'Johanna' by Jane Yolen, Johanna risked her life to save her younger sibling, showcasing the profound familial love and the lengths one will go to protect family.
Step-by-step explanation:
In the story "Johanna" by Jane Yolen, Johanna risked her life for c) Her younger sibling. The narrative revolves around the protagonist's courageous act to protect someone she holds dear. Despite the dangers involved, Johanna's love and sense of responsibility for her sibling drive her to take extreme risks. This theme elucidates the strong familial bonds and the extents to which individuals will go to safeguard their loved ones.