Final answer:
Secondary characters in 'The Prisoners Who Wore Glasses' are those other than the main ones who may support or contrast the protagonist or antagonist, contributing to the story's depth.
Step-by-step explanation:
In the context of the question regarding "The Prisoners Who Wore Glasses," the secondary characters refer to option d: Characters other than the main ones. In most stories, secondary or minor characters play vital roles that support the narrative, though they are not the focus of the story. Such characters may support or challenge the protagonist or antagonist, serving as foils, sidekicks, or simply characters that exist within the world of the story and contribute to its depth and complexity.
Secondary characters can be developed using various literary tools, such as dialogue, descriptive passages, and their interactions with the main characters. They are essential for crafting a well-rounded story that offers diverse perspectives and highlights different facets of the central conflict or theme.