The answer to your question would be tha the revision that fixes the misplaced modifier in the sentece is the following one: Relaxing on the couch, Dominic reads an article about the upcoming election.
A misplaced modifier is a word, phrase, or clause that is improperly separated from the word it modifies or describes. In this case, the misplaced modifier is a present participle phrase. This present participle phrase modifies the noun "Dominic". The participle phrase should sit right in front of "Dominic", the word it modifies or tells something about. Otherwise, the modifier would be displaced, just as in the other examples.
