The presidential veto power over legislation, the power of the Senate to approve presidential appointments, and judicial review over acts of Congress and presidential actions are examples of the principle in the American political system of:

Checks and balances

Explanation: Checks and balances can simply be defined as a system which is used to maintain equilibrium level of power such that one branch does not wielding too much power or act out of phase. Checks and balances is a system which allows each branch of government or power to amend, modify, checkmate or veto the decisions or actions of the other branches so that individual branches will be prevented from exerting or wielding too much power.

The president can veto the acts made by the legislative and presidential appointments need the senate approval. The judiciary can also review actions of both the executive and the congress.

the period of human evolution has coincided with environmental change, including ('hominin' refers to any bipedal species closely related to humans – that is, on how do we know earth's climate has changed? a map showing dates and locations of prehistoric archeological sites and migration routes from africa into.

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