Final answer:
The non-legislative powers of Congress include impeachment, proposing constitutional amendments, and approving or rejecting treaties.
Step-by-step explanation:
Non-legislative powers are those powers that a branch of government possesses that go beyond the authority of making laws. In the case of Congress, some examples of non-legislative powers are the power to impeach federal officials, the power to propose constitutional amendments, and the power to approve or reject treaties. These powers, which are not directly related to the process of making laws, allow Congress to fulfill its role as a check on the executive and judicial branches of government.
Learn more about Non-legislative powers of Congress