Answer:
The Answer is: A ti
Explanation:
The question is asking you who the person in the audio is talking to.
A ti is the answer because the person in the audio is giving advice on good/safe travels. The person talking does this in a less formal way, which is why we chose A ti over A usted. If the person in the audio talked to you in a more formal, less friendly way, the answer to this question would have been: A usted.
