which is a first responder?\ncoast guard officer\nincident commander\nsocial service worker\nemergency…

Brief Explanations:

A first - responder is an individual who is among the first to arrive and provide assistance at the scene of an emergency. Emergency medical technicians (EMTs) are trained to provide immediate medical care at emergency scenes, making them first - responders. Coast Guard officers are mainly involved in maritime safety and security, incident commanders coordinate response efforts after arrival, and social service workers typically provide support after the initial emergency phase.

Answer:

emergency medical technician