Final answer:
The High Court in Australia acts as a check on parliament in law-making by interpreting and applying constitutional principles.
Step-by-step explanation:
The role of the High Court in interpreting the Australian constitution acts as a check on parliament in law-making by interpreting and applying constitutional principles. This means that the High Court reviews laws passed by the parliament and determines whether they are consistent with the Australian constitution. If a law is found to be unconstitutional, the High Court can declare it invalid, thereby preventing parliament from enacting laws that exceed its constitutional authority.