Means fire fighting member and member of a fire department

• A. Emergency responder
• B. Fire fighter
• C. Fire warden
• D. Fire service member

Answer: (D)

The main idea here is using terminology that covers all personnel connected to the fire service. The term that means both a fire fighting member and a member of a fire department is fire service member. This designation includes anyone who belongs to the fire service, whether they actively fight fires or hold other positions within the department. That breadth is why it’s the best choice: it directly matches both aspects of the description. The other terms are narrower — a firefighter refers only to those who fight fires; a fire warden is a specific regulatory role and not necessarily a general fire department member; emergency responder is broader and can include non-fire roles. So the term that cleanly encompasses both ideas is fire service member.