Which of the following is an essential feature of electronic security?

The essential feature of electronic security is the use of alarms, sensors, and surveillance cameras. This component is pivotal because these technological devices actively monitor environments, detect unauthorized access, and record incidents. Alarms alert individuals to potential breaches while sensors can identify motion, intrusions, or other unusual activities. Surveillance cameras provide visual documentation of events, which can be crucial for both real-time responses and later investigations. Together, these tools create a comprehensive, proactive approach to security, enabling enhanced monitoring and rapid reactions to threats.

In contrast, manual checks and balances, regular meetings with security personnel, and physical barriers are more traditional elements of a security strategy. While they play important roles in an overarching security plan, they do not embody the specific characteristics that define electronic security systems, which rely heavily on technology for real-time monitoring and response.