Which of the following describes a behavioral biometric characteristic?

Behavioral biometric characteristics are based on patterns of behavior or actions that can be analyzed for identity verification. Voice recognition falls into this category because it measures the unique characteristics of a person's voice, such as pitch, tone, speed, and accent. It assesses how an individual produces sounds, which is something that can change based on various factors like mood, health, or environment, making it a behavioral biometric characteristic.

In contrast, fingerprints, retina scans, and facial structure are examples of physiological biometric characteristics. These rely on physical traits that are unique to each individual and do not change in the same manner as behavioral traits. Fingerprints are based on the unique patterns of ridges on a person’s fingers, retina scans analyze patterns in the blood vessels at the back of the eye, and facial structure refers to the anatomical features of a person's face. While these biometric types are effective for identifying individuals, they do not represent behavioral aspects.