Final answer:
The New Zealand legal system addresses the issue of biological invasions through the Biosecurity Act of 1993, which provides a framework for managing invasive species.
Step-by-step explanation:
In relation to Predator Free NZ, a key feature of the New Zealand legal system is the enactment of the Biosecurity Act of 1993, which addresses the issue of biological invasions caused by introduced species. This act is the first comprehensive national strategy in New Zealand to tackle this issue. The act provides a framework for managing and controlling invasive species, including predatory mammals, that threaten the country's native fauna and flora.