What role does a fire extinguisher play in site safety?

A fire extinguisher plays a crucial role in site safety by serving the specific purpose of extinguishing small, manageable fires quickly. This functionality is vital in preventing small incidents from escalating into larger, more dangerous fires that can jeopardize the safety of individuals and damage property. Effectively using a fire extinguisher can help control or eliminate a fire in its early stages, minimizing injury and property loss.

In contrast, other options do not pertain to the primary functions of a fire extinguisher. Providing light in emergencies is typically the role of flashlights or emergency lighting systems. Securing loose equipment relates to safety protocols for preventing accidents rather than fire containment. Meanwhile, transporting injured individuals is a responsibility often handled by emergency medical personnel and equipment, not fire extinguishers. Thus, the fire extinguisher's distinctive function of fire suppression is what solidifies option B as the correct answer.