Which condition of release involves electronic monitoring?

House arrest is the condition of release that typically involves electronic monitoring. This method is used to ensure that an individual remains within a specified location, most often their own home, while awaiting trial or serving a portion of their sentence. Electronic monitoring allows authorities to track the movements of the individual, ensuring compliance with the terms of their release.

In house arrest, the use of electronic devices, such as GPS ankle monitors, provides a mechanism to enforce the conditions of the release, offering law enforcement a way to confirm that the individual is not leaving their designated area. This approach balances the need for supervision with the ability for the individual to maintain some level of personal freedom, especially in contrast to incarceration.

Other conditions such as custody release, unsecured bond, and written promise to appear do not inherently include the active monitoring of an individual's whereabouts, which distinguishes house arrest as the correct answer in the context of electronic monitoring.