Correct option is A
The correct passive voice is (a).
Explanation:
Active Voice: The subject of the sentence performs the action expressed by the verb.
Passive Voice: The subject of the sentence receives the action expressed by the verb.
The sentence is in
present perfect tense (have attacked). To convert it to passive voice, use:
Object + has/have + been + V3 + by + subject
So:
· Subject (active): The locusts
· Object: The crops
· Passive: The crops have been attacked by the locusts.
Structure:
Active: Subject + have/has + V3 + object
Passive: Object + have/has + been + V3 + by + subject
Other Options:
· (b) Reverses subject-object.
· (c) Wrong subject and meaning.
· (d) “Were attacked” – changes tense to simple past – incorrect.