Final answer:
Motion sensors and glass break detectors are electronic protection devices used to secure building interiors by detecting movement and the sound of breaking glass, respectively, to trigger alarms.
Step-by-step explanation:
The two types of 'electronic protection devices' that are commonly used to protect the interior of a building when it is closed are motion sensors and glass break detectors. Motion sensors detect any movement within a certain range and are triggered when an unexpected change in motion is detected. This could lead to an alarm being sounded or notifications sent to the security service or building owner. Glass break detectors, on the other hand, sense the frequency or vibration caused by breaking glass, which also triggers an alarm to alert of a possible break-in. These electronic devices play crucial roles in enhancing the security of a building and safeguarding it against unauthorized entry or intrusion.