Which statement describes the Touch ID in iOS devices?

Which statement describes the Touch ID in iOS devices?

• It is used as the passcode.
• It is the encryption key set by the user.
• It is the hash value of the user fingerprint.
• It is used to set the touch screen sensitivity.
  

  Explanation: Apple uses a technology known as Touch ID in which the user sets up a template fingerprint scan that is converted into a unique hash and stored within a secure cache on the iOS device. The hash is used to authenticate with the user.