Which of the following are the three main types of security systems?

The three main types of security systems encompass Physical Security, Electronic Security, and Human Security. Physical Security involves controlling access to facilities, protecting assets, and ensuring the physical protection of people and property through methods like locks, barriers, and surveillance systems.

Electronic Security focuses on the use of technology to protect information and infrastructure. This includes security cameras, alarms, and cybersecurity measures that protect sensitive data from unauthorized access or breaches.

Human Security refers to the role of individuals in maintaining safety and security. This encompasses training personnel, implementing security protocols, and ensuring that employees understand their responsibilities in relation to security measures.

This classification provides a holistic view of security, recognizing that effective protection requires a combination of physical measures, technological solutions, and human involvement to be comprehensive and effective. Other options do not accurately capture this fundamental trio, lacking the integration of these essential aspects of security.