Which broad category uses measurements of a biological feature for authentication?

• A. Biometrics
• B. Access control
• C. Encryption
• D. Behavioral analytics

Answer: (A)

Biometrics focuses on using measurements of a person’s biological traits to verify identity. In authentication, you present a physical or physiological feature—such as a fingerprint, iris pattern, facial geometry, or voice—and the system creates a digital template to compare with a stored one. If they match, access is granted. That direct link between a biological feature and identity verification is why this category is the best fit for the prompt.

Access control is the broader system that governs who can access resources and may use biometric methods among others, encryption protects data itself rather than validating who you are, and behavioral analytics looks at patterns of behavior (like typing speed or mouse movements) rather than a physical trait.