Answer:
These are examples of the three branches of government exercising their constitutional duties.
Step-by-step explanation:
The Executive Branch (President) enforces laws and checks Congress by signing/vetoing laws. The executive branch also checks the judicial branch by appointing judges/justices.
The Legislative Branch (Congress) creates laws and checks the executive branch by impeaching the president, overruling a veto, and approving the nominees that the president nominates. They also check the judicial branch by impeaching judges and justices.
The Judicial Branch interprets the laws and checks the legislative branch by striking down unconstitutional laws.