Which biometric mechanism identifies an individual by electrical signals that are emitted by a person’s physical movement?

Which biometric mechanism identifies an individual by electrical signals that are emitted by a person’s physical movement?

A.
Facial scan

B.
Hand geometry

C.
Signature dynamics

D.
Voice print

Explanation:
When a person signs his name, a unique physical motion can be captured
electronically that can provide for a method of authentication. Signature dynamics
can capture the pressure someone uses, the slant of holding the pen, the speed of
writing, and the resulting static signature.