Which of the following is the least-likely physical characteristic to be used in biometric control that supports a large company?

Voice recognition (voiceprint) is a valid biometric modality based on unique acoustic and physiological properties of an individual's vocal tract and is supported by enterprise authentication systems.

Fingerprints are one of the most widely deployed and scalable biometric methods, with proven uniqueness across large populations and mature enterprise hardware support.

Iris patterns are highly unique even between identical twins, remain stable throughout life, and iris scanners are a well-established enterprise-grade biometric control.

Biometrics must be universal, unique, permanent, and measurable to be effective as an access control mechanism. Height and weight are not sufficiently unique among a large population, change over time due to age, health, and other factors, and cannot be measured with the precision required for reliable authentication. These characteristics disqualify them as practical biometric controls.