Which of the following is the most secure method to protect a mobile device from unwanted access?

Remote wipe is a recovery feature used to erase data after a device is lost or stolen, not a primary method to prevent unwanted access in the first place.

Biometrics, such as fingerprint or facial recognition, leverages unique biological traits for authentication, making it inherently more secure than other methods as these traits are extremely difficult to guess or steal. Biometric authentication provides a strong, convenient, and highly personal layer of security.

A Personal Identification Number (PIN) can be guessed or observed, making it less secure than biometric authentication, which relies on unique physical attributes.

Log-in attempt restrictions are a deterrent measure, but they don't prevent the initial unauthorized access attempt itself and can be bypassed if the correct credential is eventually guessed.