Final answer:
The three main steps to adopt an amendment to the Constitution are Proposal, Ratification, and Publication.
Step-by-step explanation:
The three main steps that are necessary to adopt an amendment to the Constitution are:
- Proposal: Two-thirds of both chambers of Congress must agree to the proposal or two-thirds of the states may call a convention to propose an amendment.
- Ratification: Three-fourths of the state legislatures must agree to adopt the amendment.
- Publication: The amendment becomes part of the Constitution and is officially published.