Answer:
Check the Judicial and the Executive branches of the government.
Step-by-step explanation:
The Senate's power to confirm presidential appointees to office is one of the powers that the Senate has under the system of check and balances, in which all three branches of the government have the power to oversees, limit and check each other so that a balance in the government may exist.
The President is the one that nominates or appoints ambassadors, public ministers, consuls, judges of the Supreme Court, and all other officers of the United States, but before these nominees can work under those positions, the Senate has to confirm them.