Final answer:
Increasing ventilation is a common cause for the rapid intensification of a ventilation-limited fire because it introduces additional oxygen, which fuels the fire's growth.
Step-by-step explanation:
An action that has been shown to be a common cause in the rapid increase of intensity of a ventilation-limited fire is increasing ventilation. A ventilation-limited fire occurs when the rate of heat release and fire growth is controlled by the amount of oxygen available to the fire. When the ventilation is increased, such as by opening a window or breaking through a wall, it introduces more oxygen to the fire, causing it to burn more intensely. In a fire scenario, controlled ventilation is essential; uncontrolled increases in ventilation can lead to a dangerous phenomenon known as a backdraft, where a sudden influx of oxygen leads to an explosive combustion.