Which action might lead to immediate disqualification in a match?

The use of illegal techniques is a significant reason for disqualification in wrestling matches because the rules are in place to ensure the safety of all competitors. When a wrestler employs moves that are not permitted—such as certain holds or strikes that can cause injury or are deemed too dangerous—it compromises the integrity of the sport. Officials are trained to identify these illegal actions and enforce penalties, including disqualification, to protect athletes and uphold fair play.

In contrast, while offensive moves that cause injury can lead to penalties, they do not automatically result in disqualification unless they fall under illegal techniques. Excessive celebration may be frowned upon, but it typically results in a warning or minor penalty rather than disqualification. A fall occurring in the final period is part of the natural progression of a match and does not warrant disqualification. Thus, engaging in illegal techniques directly breaches the foundational rules of wrestling, leading to an immediate disqualification to maintain the safety and fairness of the competition.