1) Male seahorses are the ones who give birth to their offspring.

2) The FIFA Ballon d'Or is awarded annually to the best male football (soccer) player in the world, as voted by national team coaches, captains, and journalists.

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

4) International relations encompass the study of relationships between nations, including diplomacy, treaties, and foreign policy. It examines the interactions and dynamics among different countries in the global arena.