The main reason to use a visual aid in a presentation is to a ensure concepts are more challenging to understand. b make a challenging concept easier to understand. c guarantee that complex information is accurate. d keep an audience’s attention through distraction.

D keep the audiences attention through distraction

d keep an audience’s attention through distraction.

Explanation:

Advantages of Visual Aids in a Presentation:

A picture is worth a thousand words - presentation softwares let you display images and videos that help prove the speaker's theses. By using graphics to show trends or using photographs to showcase a product, the speaker helps the audience better visualize (and therefore understand) what he or she tells you.Appeals to many senses - While oral speech mainly stimulates hearing, the use of multimedia tools stimulates other senses, especially vision. To see is to feel. And for some auditoriums that makes all the difference: Have you ever wondered why tradeshow vendors insist on permanently repeating demonstrations without forgetting the videos that explain the benefits of their products?Greener and more versatile support - Multimedia presentations save paper: a single presentation can be seen by all members of the auditorium without photocopying. On the other hand, they allow greater creativity and originality in the presentation of contents when compared to paper.Easy content creation - Multimedia tools allow you to quickly and simply dress up and embellish the speaker's ideas and make them visually appealing. In fact, no Visual Design course is required to make captivating slides.

Hypothesis: volumes of both figures are equal.the volume of  figure 1 is: .the volume of figure 2 is: .since , you can conclude that and . so, .volumes of figures are equal only when an angle in the basis is right (then figures will be the same), in another cases volume of figure 1 is less than volume of figure 2.the hypothesis was not correct in all cases.

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