What action would lead to a team being penalized for excessive celebration?

A team is penalized for excessive celebration primarily due to demonstrating unsportsmanlike behavior after a touchdown. This is in line with NFHS rules, which emphasize the importance of sportsmanship and maintaining a respectful environment during the game. Celebrations that involve excessive time or are deemed disrespectful to opponents, officials, or the game itself can result in a penalty.

In this context, excessive celebration might include actions like taunting opponents, using props, or engaging in behavior that prolongs the celebration unnecessarily. Such actions can detract from the spirit of the game and are addressed with penalties to uphold a standard of conduct among players.

The other options do not directly tie to the idea of excessive celebration. Not returning to the sidelines promptly relates to game flow and organization, while taking too long to set up for the next play addresses a team's readiness rather than the celebratory aspect. Failing to attempt the extra point is a game strategy decision and does not involve the conduct or demeanor of players post-touchdown. Thus, demonstrating unsportsmanlike behavior after scoring is the specific action that would lead to a penalty for excessive celebration.