Which of the following actions constitutes "unsporting behavior" in soccer?

The action that constitutes "unsporting behavior" is taunting or excessive celebration during a match. This type of behavior goes against the principles of sportsmanship and respect that are essential in soccer. It not only shows a lack of respect towards opponents but can also provoke negative reactions and escalate tensions on the field. Soccer is built on a foundation of respect and fair play, and actions like taunting undermine that spirit by attempting to ridicule or belittle the other team, which is contrary to the ethos of the game.

In contrast, congratulating opponents after a game reflects sportsmanship and respect, as does helping an injured player from the opposing team. Following the referee's decisions without argument also demonstrates respect for the authority of officials and the rules of the game. These actions enhance the competitive experience and promote a positive atmosphere in the sport.