Question

If fair use applies, it is not necessary to cite the sources of the visual and audio materials in your slide show.

Answer 1

its false like the other person said :>

Answer 2

This statement is false.
Regardless of the fact whether fair use applies or not, you should always cite the sources of the visual and audio materials in your slide show. It can still be considered plagiarism if you don't cite your sources, so make sure you do that.