The only given option that is a physical security measure is; Passwords
Physical security is defined as the protection of personnel, hardware, software, networks or data from the adverse effect of human actions and events. These adverse actions or events could lead to severe loss and damage to an enterprise or any institution or even personnel.
Now, among the given options, firewall is a network security that simply monitors and filters the incoming and outgoing network traffic on a computer.
Anti-virus is uses to detect and remove corrupt files from a computer system. Whereas passwords are physical security measures because they involve human actions.
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