Which of the following is commonly used equipment by security guards?

The correct answer identifies equipment that is essential for security guards to perform their duties effectively. Flashlights, radios, and protective gear are critical tools in a security guard's arsenal.

Flashlights are important for visibility, especially during nighttime patrols or in low-light environments, ensuring that a security guard can observe and navigate their surroundings effectively. Radios facilitate communication, allowing for coordination among security personnel and with law enforcement or emergency services, which is vital in situations requiring immediate response or assistance. Protective gear, such as vests and helmets, provides physical safety for guards, especially when they may be exposed to potentially dangerous situations.

While personal computers and office furniture are important in an office setting, they do not directly aid in the physical security tasks that guards perform. Surveillance drones, while increasingly used in the security field, are not as commonly relied upon as the essential tools of flashlights, radios, and protective gear during everyday security operations. Thus, the answer reflects basic equipment that is vital for the direct responsibilities of a security guard.