Final answer:
The correct passive voice for 'Why does the peon ring the bell?' is 'Why is the bell rung by the peon?', which reflects the correct structure of a passive voice transformation.
Step-by-step explanation:
The passive voice of the question 'Why does the peon ring the bell?' is 'Why is the bell rung by the peon?'. When converting a sentence from active to passive voice, the subject receives the action instead of performing it. The original sentence's active voice structure ('the peon ring the bell') changes to a passive structure ('the bell is rung by the peon'), where 'the bell' becomes the subject that receives the action, and 'the peon' is now the agent performing the action indicated by the preposition 'by'. The correct form of the verb 'to be' (is) and the past participle of the verb 'ring' (rung) are correctly used to form the passive construction. Therefore, the correct passive voice for the question is option a).