responder

A responder is someone who responds to a situation or an emergency, often in a professional capacity. It can also refer to a person who answers a phone call or message.

In everyday life, the word "responder" is commonly used in situations where someone needs help right away. For example, if there's a fire in a building, firefighters are the responders - they rush to put out the flames and make sure everyone gets out safely. In medical emergencies, like car accidents or heart attacks, emergency medical technicians (EMTs) are responders who arrive quickly to give treatment. Police officers can also be considered responders when they respond to calls about crimes in progress. On a more mundane level, customer service representatives are often referred to as responders because they answer phone calls and emails from customers with questions or complaints.