Final answer:
The judiciary, particularly the Supreme Court, uses the power of judicial review to act as a check on parliament in law-making by striking down laws that are unconstitutional.
Step-by-step explanation:
The concept of 3B acting as a check on parliament in law-making refers to the judiciary, specifically the Supreme Court, exerting its powers to ensure balance and constitutionality in the law-making process.
Judicial review is the most relevant power in this context (option 1). The judiciary (Supreme Court and lower courts) has the authority to strike down laws that it deems unconstitutional, ensuring that the legislature does not overstep its bounds or violate the constitution.
While the other options listed describe checks and balances within the U.S. governmental system, they do not directly apply to how 3B -- which appears to refer to the judiciary -- checks on Parliament specifically in law-making. The power to appoint Supreme Court judges (option 2) and the power to veto laws (option 3) are executive functions, and the power to dissolve Parliament and call for new elections (option 4) is not a judicial function.
Furthermore, the judiciary's power is balanced by other facets of the government; judges are appointed by the president and must be confirmed by the Senate, and Congress can propose amendments to the Constitution to undo Court decisions or remove certain issues from the courts' jurisdiction.