Which of the following BEST describes a security control that requires validating the user's physical characteristics?

One-Time Passwords (OTPs) are temporary passwords used for authentication, typically delivered via SMS or generated by an app, and do not involve physical characteristics.

Biometrics refers to security methods that use unique biological and physical characteristics, such as fingerprints, facial patterns, or iris scans, to verify a user's identity. This directly matches the description of validating physical characteristics.

Radio-Frequency Identification (RFID) uses electromagnetic fields to automatically identify and track tags attached to objects, not human physical characteristics for user validation.

Security cameras are used for surveillance and monitoring, not for directly validating a user's physical characteristics for authentication purposes.