Final answer:
Legislative oversight is exemplified by a legislature's ability to override a presidential veto. This is a part of the checks and balances in a presidential system that prevents any one branch from becoming too powerful by ensuring that the legislative branch can check the executive's authority.
Step-by-step explanation:
An example of legislative oversight is the ability of a legislature to override a presidential veto. In a presidential system, the balance of power is maintained through a system of checks and balances, where separate branches of government have overlapping powers to prevent any one branch from exerting too much influence. When a legislature—such as Congress in the United States—passes a bill, the President has the authority to veto it, which is a check on legislative power. However, Congress can exercise oversight and check the President's power by overriding the veto with a two-thirds majority vote, known as a supermajority. This ensures that the President's refusal to sign a bill into law does not become an absolute barrier to legislation.
Oversight also includes the legislature's role in monitoring and reviewing the actions of the executive branch and bureaucracy, but the veto override is a clear and concrete example of legislative power in action. This process exemplifies the system's ability to remain balanced, with each branch supervising and limiting the powers of the others to prevent corruption and abuse of power.