What is the recommended approach for entering a structure filled with smoke?

Staying low to the ground is the recommended approach for entering a structure filled with smoke due to the behavior of smoke and heat in a fire scenario. Smoke rises, and as it accumulates, the cleanest and coolest air is typically found closer to the floor. By remaining low, a firefighter can enhance their visibility and potentially breathe in air that is less contaminated compared to what is higher up where smoke concentration is greater.

Additionally, smoke can be highly toxic and can reduce visibility significantly. By staying low, firefighters can navigate more safely and effectively through a smoky environment, allowing them to locate victims, assess the situation, and carry out their responsibilities without being overwhelmed by smoke inhalation.

While other approaches, such as covering the face or moving quickly, may be relevant in different contexts, they do not address the primary concern of maintaining visibility and reducing exposure to harmful smoke inhalation as effectively as staying low does.