For passive, The beggar was laughed at by the boy.
Explanation: For passive the subject isn’t doing the action. So, in this case, the boy is the subject, and he’s doing the laughing. There’s also a sense that a passive sentence is wordy and could be shortened.
Answer:
B. (I can't see the whole answer, but that's my best choice. Next would be C.)
Explanation:
Themes can appear in stories, most news articles don't really have themes, and not all themes are specific to one story.