Final answer:
The primary function of the Senate is to approve presidential appointments and ratify international treaties, ensuring checks and balances within the government.
Explanation:
The primary function of the Senate is to approve presidential appointments, including ambassadors and key government officials, and ratify international treaties negotiated by the President. This process gives the Senate a voice in how these governmental organizations are run. Additionally, the Senate has the exclusive power to confirm executive and judicial appointments and plays a crucial role in the system of checks and balances within the government.
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