Which of the following is an example of an "electromechanical" lock?

A smart lock with a keypad is an example of an "electromechanical" lock because it combines mechanical locking mechanisms with electronic components to provide enhanced security and functionality. These locks typically allow access through a keypad where users can enter a code to unlock the door, integrating technology with traditional locking concepts.

Unlike purely mechanical locks, such as traditional key locks, combination locks, or a deadbolt without electronic components, electromechanical locks utilize electrical power or electronic controls to operate. This allows for additional features such as remote access, integration with security systems, and programmable user codes, which significantly enhance convenience and security.