Concept:Judicial review is the power of the judiciary to examine the actions of the executive and other arms of government to ensure they comply with the constitution.
Explanation:In a federal state, power is shared between the central government and the component units.
The judiciary acts as the guardian of the constitution and the umpire in disputes between the executive and other branches of government.
Through judicial review, the courts scrutinise the actions, policies, and laws made by the executive to determine whether they are consistent with the constitution.
If an executive action or law is found to be unconstitutional, the judiciary declares it null and void.
This power enables the judiciary to control the executive and prevent the abuse of power in a federal state.
Delegated legislation is a process where the legislature gives the executive power to make laws, not a means of control.
Judicial overview and motions are not recognised constitutional mechanisms for controlling the executive.
Therefore, the correct means by which the judiciary controls the executive is judicial review.
Answer:C. Judicial review