Ethical use of digital content

Ethical example:

A teacher uses a photograph from the Unsplash platform where it is clearly indicated that the image is free to use. Under the photograph, the teacher writes: “Photo: ‘Title of the photograph’ by Author’s Name, retrieved from Unsplash.com.“

Unethical example:

A teacher copies parts of a scientific article and includes them in a course presentation without citing the author and the source.