What legal issue did Jack face when he downloaded graphics from Nike's website without citing his source?

The situation Jack encountered relates specifically to copyright law, which protects the original works of authorship, including graphic designs found on websites. When Jack downloaded graphics from Nike's website without citing the source, he infringed upon the copyright held by Nike over those images. Copyright law grants the creator exclusive rights to their work, meaning that others cannot use or reproduce it without permission.

This is important to understand in the context of using online resources. When individuals utilize content from the internet, they must either seek permission from the copyright owner or ensure they are using the material in a way that falls under fair use. Failing to do so, as Jack did by downloading and using Nike's graphics without citation, constitutes a violation of copyright law.

Trademark violation pertains to the misuse of brand logos or symbols that distinguish goods and services, while privacy infringement deals with unauthorized use of someone's personal information. Patent breach relates to inventions and processes, not artistic works like graphics. Thus, these options do not apply to Jack’s situation.