How many men's national football teams are there in FIFA?

FIFA oversees a large number of men's national football teams, which reflects the global nature of the sport and the diverse countries involved. The correct answer, 209, refers to the number of member associations that are recognized by FIFA, allowing for competitive participation at the international level. This figure encompasses a wide range of countries, including those with established football traditions and others where the sport is still developing.

The variations in the other potential answers stem from the constant changes within FIFA's membership as countries may join or depart, or as their status changes based on different factors, including political or administrative decisions. Thus, 209 stands as the accurate representation of member national teams as of the latest updates, showcasing FIFA's extensive reach in promoting and regulating football around the world.