In this passage, the mistake is the fact that the words "day" and "windy" need to be switched around. Instead of "day windy" the sentence should read "windy day." Therefore, the proofreading mark I would use would be two arrows. One arrow would go from "windy" to "day," while the other one goes in the opposite direction.
There is a quizlet (search the same question in go0-gle) that mentions this question, I’d suggest to give it a look if you have any problems answering questions.
