Concept:The impeachment process is a mechanism for removing a public official from office and is most strongly identified with the presidential system of government.
Explanation:In a presidential system, the executive branch led by the president is separate and independent from the legislature.
Because of this separation of powers, the legislature cannot remove the president through a simple vote of no confidence.
Instead, the constitution provides impeachment as a legal procedure to remove the president for serious offences such as treason, corruption, or abuse of power.
The parliamentary system does not require impeachment because the executive is drawn from the legislature and can be removed by a no-confidence vote.
Federal and unitary systems are classifications of how power is shared between central and regional governments, not methods of removing leaders.
Therefore, impeachment is a unique feature of the presidential system.
Answer:B. presidential system