1. The process by which the Constitution was approved by the states is known as

A. vetoing.

B. ratification.

C. impeachment.

D. levying.

Its not A because vetoing is voting no to it. its not c because that's how to take the president out of office and levying is related to taxes so your answer is B

B. Ratification

A. This is a power the president has, to veto a bill/law.

C. Impeachment is when the President gets "kicked" out of office for doing something incorrect.

D. Levying Imposing a tax, etc.

Thus, once the Constitution was approved it was known as ratification.