Final answer:
PSA stands for Public Service Announcement. It is a message broadcasted in the media to raise awareness about a particular issue.
Step-by-step explanation:
PSA stands for Public Service Announcement. A Public Service Announcement is a message that is broadcasted in the media to raise awareness about a particular issue. In the context of Red Bull, a PSA could be used to promote responsible consumption of their energy drinks by including information about the potential risks and guidelines for safe use.