Answer:
In a presentation, you should place media at the end of it.
Step-by-step explanation:
When making a presentation, the first part is going to be about the main idea, you will probably explain it orally and, after that, you can show a media presentation to your audience to make the whole speech more dynamic and entertaining. Also, it will help them understand better the concept you are trying to expose and will help them see the whole picture of the idea.