1. The presidential appointment of Supreme Court justices is an example of a. judicial review c. informal amendment b. checks and balances d. formal amendment.

The presidential appointment of Supreme Court justices is an example of checks and balances. This is because the power of the president to appoint justices is a check on the power of the judicial branch, and the Senate's power to confirm or reject these appointments is a balance to the president's power. This system ensures that no single branch of government becomes too powerful.