The answers is “C”. Demonstrative is mostly used in ordinary speeches or writing.
The diagram that shows how the sun and moon line up during an eclipse is the most important visual aid to use.
<h3>What is a
visual aid?</h3>
These refers to an images or video that is used to support a lecture and helps in making the topic seem more real to the audience.
Hence, the diagram that shows how the sun and moon line up during an eclipse is the most important visual aid to use during the speech about the solar eclipse.
Therefore, the Option B is correct.
Read more about visual aid
<em>brainly.com/question/3424197</em>
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The right answer for the question that is being asked and shown above is that: " message and help the audience retain the information presented" PowerPoint should reinforce the speaker to present a <span> message and help the audience retain the information presented</span>
B.) change "have" to "has"
