Answer:
The correct answer to the question: Which sentence combines the two sentences using a past participle, would be, choice D: The vines having been tangled, I stepped into the middle of them.
Step-by-step explanation:
The reason for this being the correct answer is, first that the only option where there are two sentences being joined, is the last one. All others are simple sentences. The second is, that for regular verbs, their participle form will always be with "ed", and the one choice that offers both qualifications is option D.