Statement 1 is Correct: Iris scanning uses mathematical pattern-recognition techniques on images of the iris, which contains complex and unique patterns that remain stable throughout a person's life. Statement 2 is Correct: Retinal scanning identifies individuals by mapping the unique patterns of blood vessels on the retina at the back of the eye, which is a highly accurate physiological biometric. Statement 3 is Correct: Voice recognition identifies individuals based on unique vocal characteristics, including physical traits of the vocal tract and behavioral patterns like pitch and cadence.