Terrance is going on the road to show how the world's climate has been changing. He is going to show how the polar ice caps have receded over time. He will be speaking in auditoriums around the country, and in each case the audience will likely have at least 150 people. His presentation was created in Prezi and contains no more than seven lines of text, each with no more than seven words. He was sure to plan for a medium that would keep his listeners' attention while never straying from the relevance of his presentation. What rule for using visual aids was Terrance considering above all?

The rule he is using is to use a few lines of text.

Explanation:

Terrance is preparing to use visual aids in his presentation. This is a great idea, since the visuals are able to draw the audience's attention efficiently, in addition to allowing some information, from the presentation, to be highlighted.

However, to use visual aids in presentations it requires that some rules be followed. One of these rules is to use a few lines of text, which is what Terrance is doing. By using a few lines of text, Terrance is able to draw the audience's attention to a specific theme, but without taking his attention away from what he will say about that theme. In addition, when using this rule, Terrance provides a clean presentation without excess information that will tire listeners.