Answer:
When using pictures in your presentation, you must add credit to the pictures owners, in addition to providing references about where you found the image.
Step-by-step explanation:
It is correct that any picture used in a presentation presents the references and credits to the owner of the image. This prevents your presentation from being marked as a work with plagiarism, as the pictures have copyright that must be respected and exposed.
In addition, referencing the owner of the picture is a way of valuing all the time and dedication that was used to create the picture.