Keep in mind that when you are designing in Canva, you need to ensure you are authorized to use any copyrighted materials, including photos, illustrations, sounds, or videos that you upload to Canva.
If you upload elements to add to your designs, you should verify the source of the element and license status. The easiest way to ensure you have the rights to an image is to only upload images you created yourself or that you have permission to use.
Images sourced from royalty-free content websites like Pexels, Pixabay or Unsplash will provide licensing information that specifies how you can use the image. This includes who is allowed to post the image for free (Personal use vs. Commercial use) and if attribution to the creator is required.
Image sources:
NC State Photos
Adobe Stock Images
Pexels
Unsplash
Canva Enterprise also provides access to a vast library of elements, including illustrations, photos, sounds, and videos, which you can incorporate into the designs you create. Please note, however, that these are elements to be remixed and used in designs. Canva will not let you download an individual element.
For more information on copyright, you can consult Canva's Intellectual Property Policy and NC State University's Copyright Guidance.