Which of the following types of data is covered by GDPR?

The General Data Protection Regulation (GDPR) is a comprehensive data protection law in the EU that focuses primarily on the privacy and protection of personal data. The regulation specifically targets any data that can be used to identify an individual, which is referred to as personal identification information. This includes items such as names, email addresses, phone numbers, and any other details that can be linked to a living person.

By covering personal identification information, GDPR aims to give individuals greater control over their personal data and how it's collected, stored, and processed by organizations. This aligns with the overarching goals of the regulation to enhance privacy rights and promote transparency in data handling. The other options listed do not fall under personal data as outlined by GDPR; financial forecasts, trademarks, patents, and business revenue reports typically do not contain personal information that can identify individuals. Therefore, personal identification information is the correct choice, as it directly aligns with GDPR’s scope and purpose.