Which of the following is a risk associated with using positive-pressure ventilation incorrectly?

Using positive-pressure ventilation incorrectly can lead to the unintentional spreading of the fire. This method involves forcing fresh air into the structure, which can create airflow patterns that inadvertently carry flames and heat to unburned areas. If the ventilation is not properly coordinated with firefighting efforts, or if it is applied too soon before the fire is fully contained, the increased oxygen can help the fire to grow and spread instead of aiding in extinguishing it. Proper timing and coordination between ventilation and firefighting tactics are crucial to prevent this risk, ensuring that firefighters maintain control over the fire's progression and that ventilation efforts effectively remove smoke and heat without exacerbating the situation.