Which of the following security tools is the most appropriate choice for a minimal-cost reception area?

The most appropriate choice for a minimal-cost reception area is the camera. Cameras serve as a cost-effective security measure that allows for surveillance and monitoring of the area without the ongoing expenses associated with personnel. They can deter unauthorized access and provide valuable footage in case of incidents.

Cameras offer a degree of security by allowing staff to monitor activities in real time, and recorded footage can be vital for investigations and evidence collection. Additionally, they can be installed to cover various angles and locations around the reception area, enhancing overall security without the costs associated with employing a physical security guard.

In contrast, a firewall and an intrusion-detection system are more relevant for protecting digital data and network security, rather than physical security measures for a reception area. While security guards provide human presence and immediate response capabilities, employing guard services can significantly increase costs compared to the one-time investment of camera installation.