Answer:
where are the limbs out on which we once walked?
Explanation:
In these lines, the author employs incorrect syntax in order to prove a point. Syntax refers to the arrangement of words in a way that creates well-formed sentences. This is the type of syntax that is not usually employed by knowledgeable or educated people. However, the author proves that he is able to use proper syntax in this sentence, which is written in an appropriate way.