Which of the following is an example of a visual identifier for a speaker in a production?

A lower third is a graphical element that appears in the lower part of the screen, typically used to display a person's name, title, or other relevant information during a production. This visual identifier helps the audience recognize the speaker, provides context about who they are, and enhances their connection to the content being delivered. By incorporating a lower third, productions can clearly communicate important details to viewers, improving the overall understanding of the material and maintaining viewer engagement.

In contrast, a transition slide is used to signal a shift from one scene or segment to another rather than identifying a speaker. An audio cue involves sound elements that can enhance the storytelling or signal connectivity but does not visually identify speakers. A title screen typically provides the title of the production or segment but does not focus on individual speakers, thus lacking the specific identification purpose that a lower third serves.