How is "emergency medical services" (EMS) related to firefighting?

Emergency medical services (EMS) is closely related to firefighting as it encompasses the medical assistance that firefighters are trained to provide during emergencies. Firefighters are often first responders to various incidents, including fires, vehicle accidents, and medical emergencies. They are equipped with the skills and knowledge to deliver immediate medical care, such as CPR, first aid, and trauma care, before more advanced medical personnel arrive on the scene. This capability allows firefighters not only to tackle fire-related situations but also to address the urgent medical needs of individuals affected by various emergencies.

In contrast, other choices do not accurately describe the relationship between EMS and firefighting. Building maintenance, psychological support, and surface firefighting techniques, while relevant to different aspects of emergency response or firefighting, do not specifically pertain to the medical assistance aspect that EMS provides in conjunction with firefighting duties.