We can see that the one that represents an elliptical version of the original sentence is: A. The giant machine groaned as if tortured; the robot, as if in response.
Elliptical sentence is actually known as a sentence that omits a word or words which is done for the grammatical completeness of the sentence. When sentences show ellipsis, then we say they are elliptical.
We can see that the sentence that represents an elliptical version of the original sentence is "The giant machine groaned as if tortured; the robot, as if in response."
Learn more about ellipsis on https://brainly.com/question/450229