1) The United Nations Security Council is responsible for maintaining international peace and security, with five permanent members (China, France, Russia, the United Kingdom, and the United States) holding veto power over resolutions.

2) The Federal Reserve System, often referred to as the Fed, is the central banking system of the United States.

3) Emma Watson is a British actress and activist known for her role as Hermione Granger in the "Harry Potter" film series. She has since starred in films such as "The Perks of Being a Wallflower" and has been actively involved in promoting gender equality and women's rights.

4) The sunflower is not a single flower but a cluster of small flowers arranged in a spiral pattern.