Simplify the following text for a Grade 8 native English-speaking person.
Original: The FIFA World Cup ( also called the Football World Cup , the Soccer World Cup , or simply the World Cup ) is an international association football competition contested by the senior men 's national teams of the members of FÃ dÃ ration Internationale de Football Association ( FIFA ) , the sport 's global governing body .
Simplified: The FIFA World Cup is the most watched sport of football ( soccer ) . The FÃ dÃ ration Internationale de Football Association ( FIFA ) puts together the World Cup every four years .