Answer:
A parliamentary system is a system of government in which the ministers of the executive branch are drawn from the legislature and are accountable to that body, such that the executive and legislative branches are intertwined. In such a system, the head of government is both de facto chief executive and chief legislator.
Parliamentary systems are characterized by no clear-cut separation of powers between the executive and legislative branches, leading to a different set of checks and balances compared to those found in presidential systems. Parliamentary systems usually have a clear differentiation between the head of government and the head of state, with the head of government being the prime minister or premier, and the head of state often being a figurehead, often either a president (elected either popularly or by the parliament) or a hereditary monarch (often in a constitutional monarchy).