The passive voice is formed using a form of the verb 'to be' (is, am, are, was, were, will be, etc.) followed by the past participle of the main verb. It emphasizes the object of the action rather than the subject.
Let's analyze each option:
The question asks which sentence uses the passive voice correctly. Options 1, 3, and 4 all correctly use the passive voice. However, without further context or a specific tense requirement, all three are grammatically correct passive constructions. If the question implies a single best answer, it might be seeking a common or typical example. In many contexts, the simple past passive (option 1) is a very common and clear example.
Given the options, and assuming there might be an intended single answer, option 1 is a strong candidate as a standard example of the past passive voice.
Final Answer: All options 1, 3, and 4 are grammatically correct passive voice sentences. If only one answer is permitted, option 1 is a common and clear example.