Final answer:
Biometric access is not a physical control. Security guards, firewalls, and encryption are examples of physical controls used to ensure security.
Step-by-step explanation:
B)
Biometric access is not a physical control. Biometric access refers to the use of a person's unique physical characteristics, such as fingerprints or facial recognition, to grant them access to a system or facility. While it is a security measure, it does not physically control access in the same way that security guards, firewalls, and encryption do. Security guards physically monitor and control access, firewalls are hardware or software systems that block unauthorized access to a network, and encryption is the process of converting information into a code that can only be accessed by authorized individuals.