Final answer:
The clearest example of a theme is the lion as a symbol of courage.
Step-by-step explanation:
The clearest example of a theme is option A, The lion as a symbol of courage. In literature, a theme is a central idea or message that the author conveys through the story. In this example, the theme of courage is represented by the lion, which is commonly associated with bravery and strength. The use of a symbol helps to reinforce and highlight the theme throughout the story.
Learn more about theme in literature