The passive voice of "drive away the cow" is "The cow is driven away".
In the original sentence, "drive away" is the active verb, and "the cow" is the direct object. In the passive voice, the object becomes the subject, and the verb is changed to "is driven away".
This transformation reflects a shift in focus from the action itself to the object being acted upon. The agent performing the action (the person driving the cow away) is not mentioned in the passive voice sentence.
