Who must approve bills for them to become law, according to Section 7 of Article I?

The correct answer is the President, as this role is critical in the legislative process outlined in Section 7 of Article I of the Constitution. Once both the House of Representatives and the Senate have passed a bill, it is presented to the President. The President has the authority to either sign the bill into law or veto it, which means rejecting it. If the President does not sign or veto the bill within ten days while Congress is in session, it automatically becomes law. However, if the President does veto the bill, Congress can still make the bill law by overriding the veto with a two-thirds majority in both chambers.

This process ensures that the executive branch has a check on legislative actions, as the President's approval is necessary for bills to officially become law. Understanding this part of the legislative process is essential for grasping how laws are enacted in the United States.