Clause in the constitution that allows Congress to do all of their powers

The correct answer is:

The Necessary and Proper Clause. "Clause 18: The Congress shall have Power: To make all Laws which shall be necessary and proper for carrying into Execution the foregoing Powers, and all other Powers vested by the Constitution in the Government of the United States, or in any Department or Officer thereof."

Explanation:

The founding fathers of the United States prevented that absolute power could fall in the hand of one branch by requiring the agreement of other branches to make decisions and by creating a bicameral legislative Congress, which is divided by the Senate and the House of Representatives.

The Constitution gives Congress the most important power, which is to make laws. For a bill to become law both the Senate and the House of Representatives need to agree on passing it as a law, but the Constitution also grants other powers to the Congress under Article 1 Section 8 such as:

To coin money, to regulate commerce with foreign nations, to lay and collect taxes, to borrow money from the United States' credit, to raise an army, to declare war, to establish rules of immigration, to establish Post Offices, to make rules for the government, to constitute federal courts.

The Necessary and Proper Clause is found in the Constitution of the United States under Article 1 Section and is one of the most powerful clauses since it grants the power to create additional legislation to the Congress to support the already granted powers under Article 1 Section 8.