Answer: The arrow is pointing to the receiver of the action ("The car") in the first sentence/image.
Step-by-step explanation: In active sentences, the doer of the action is usually the subject, while the receiver of the action is usually the object. In the other hand, in passive sentences, the receiver of the action that the verb is denoting is the subject. Therefore, a passive sentence is formed by moving the object of an active sentence to subject position and by changing the form of to verb to "to be" + past participle. In the sentence "The car was driven through mud, snow, and water", the receiver of the action, that is to say "was driven", is "the car". "Through mud, snow, and water" only makes reference to the ground, the surface on which the car was driven. Therefore, the first image with the arrow pointing to "the car" is the correct option.