The correct answer is option C, There are different kinds of bravery.
Reason -
Theme usually represents the learning’s from the lessons or the poem. The theme is the conclusion of the entire story and some time with in a subjected work there can be more than one theme. Here in this case “There are different kinds of bravery” can be considered as a learning from an article or story, while other options just represents an instance from the same story or lessons.