Which act regulates privacy in Australia?

The Privacy Act 2003 is the correct answer because it specifically establishes the framework for the protection of personal information in Australia. This legislation outlines how personal data should be collected, stored, used, and disclosed by organizations, ensuring that individuals have rights regarding their personal information. The act is designed to enhance individuals' privacy and control over their data, reflecting the growing importance of privacy in an increasingly digital world.

In contrast, the other acts mentioned do not pertain to privacy regulations. The NSW Food Act 2003 focuses on food safety and hygiene, the Liquor Act 2007 governs the sale and supply of alcohol, and the WHS Act 2011 is concerned with workplace health and safety regulations. None of these acts address issues related to the handling of personal information, which is the key aspect defined by the Privacy Act.