Biometric authentication methods (such as fingerprint scans, facial recognition, or iris scans) provide strong protection against unauthorized physical access to sensitive systems and data. These methods ensure that only authorized individuals can access secured facilities or devices.

Option A: Software patching addresses software vulnerabilities, not physical access.

Option B: Data encryption protects data confidentiality, but does not prevent physical access attempts.

Option C: Firewalls protect network access, not physical access.

Thus, biometric authentication protects against unauthorized physical access.