What is a 'keypad' in burglar alarm systems?

A 'keypad' in burglar alarm systems serves as an interface for users to interact with the alarm system. It is primarily used to input codes, which may include arm or disarm commands, and to control various other functions of the alarm system. Users typically enter a numerical code on the keypad to trigger specific actions, such as setting the system to 'away' or 'stay' mode, or accessing other system features.

Understanding the role of the keypad is crucial for effectively managing an alarm system. It acts as a central point for user commands, making it an essential component of the overall security setup. This is why the choice highlighting its function as a device used to input codes and control the alarm system is correct. The options referring to motion detection, alarm sounds, or remote controls describe different components of a security system, but they do not cover the specific function of the keypad. Each of those elements has distinct roles that contribute to the overall security process.