The example that best represents a violation of a person's privacy in relation to their personal buying habits is:
A company uses a person’s TV viewing data to target them for buying a new streaming service subscription.
This instance directly involves the collection and use of personal information about an individual's consumption habits (in this case, their TV viewing) to market products (a new streaming service) specifically to them, which raises concerns about privacy and consent regarding targeted advertising.
While the other options also involve privacy violations, they pertain to different contexts—such as identity theft, unauthorized use of sensitive information, and discrimination based on genetic information—rather than specifically focusing on personal buying habits.