Executive Order: An executive order is a directive issued by the president of the United States that manages operations of the federal government. It has the force of law but does not require approval from Congress.
Statute: A statute is another term for a law enacted by a legislative body. It can refer to laws at both federal and state levels.
Amendment: An amendment is a change or addition made to the U.S. Constitution or any other legal document. Amendments often address important social issues or modify existing laws.