Respuesta :
For 1st question: Other checks and balances include:. Executive over the judicial branch. The president appoints all federal judges. legislative branch must approve appointments that the president makes; the Senate must approve treatjes that the president makes; and the legislative branch may investigate the executive branch.
For 2nd: Any amendment required unanimous consent of the states. The Articles of Confederation created a national government composed of a Congress, which had the power to declare war, appoint military officers, sign treaties, make alliances, appoint foreign ambassadors, and manage relations with Indians.
For 3rd:The major downfall of the Articles of Confederation was simply weakness. The federal government, under the Articles, was too weak to enforce their laws and therefore had no power. The Continental Congress had borrowed money to fight the Revolutionary War and could not repay their debts.
Hope I helped!