Hello. You did not inform the context or the text to which this question refers, which may leave the answer a little inaccurate, however, I will try to help you in the best possible way.
Answer:
It is likely that the presenter would prefer to use audio because it is a form of media that is more accessible to all citizens of a location, which would allow a greater number of people to have access to the information that he wanted to broadcast.
Explanation:
Audio is one of the most democratic forms of media and information dissemination, probably this is the main reason why many communicators prefer to use this type of media to spread their messages. In addition to the fact that vehicles that transmit audio are cheaper and are present in the homes of most citizens, these transmitters are capable of spreading messages to people who are busy, who cannot see, who cannot read, who are working, who are through some activity or any other situation.
