Final answer:
Flashing lights on a billboard are an example of a visual prompt, which is used to attract attention to the words on the billboard and improve readability.
Step-by-step explanation:
Flashing lights on a billboard that make it more likely you will read the words on the billboard constitute a kind of prompt. The type of prompt used in this example is A) Visual prompt. This is because flashing lights provide a visual cue that draws the viewer's attention to the billboard, making the words more noticeable and likely to be read. Visual prompts are a powerful tool in advertising and can significantly influence a viewer's attention and behavior. The type of prompt used in the example of flashing lights on a billboard that make it more likely you will read the words on the billboard is a visual prompt. Visual prompts rely on visual cues or stimuli to capture the reader's attention or guide their actions. In this case, the flashing lights are visually stimulating and draw the reader's eyes towards the words on the billboard.