The person who would put out a fire is the bombero (firefighter). Firefighters are trained and equipped to extinguish fires and ensure safety during fire emergencies

• Carpintero means carpenter, who works with wood and tools like a hammer.
• Martillo means hammer, which is a tool, not a person.
• Policía means police officer, who maintains public safety but does not put out fires

Therefore, the correct answer is bombero.