What is the function of a detonator in an explosive device?

The function of a detonator in an explosive device is primarily to provide ignition. Detonators are crucial components that trigger the explosive reaction in the device, transforming the energy stored in the explosive material into a rapid expansion of gases, which produces an explosion. This ignition can occur through various methods, such as electrical current, shock waves from another explosive, or chemical reactions, depending on the type of detonator used.

The other options focus on different aspects of explosive devices. Stabilizing the explosive deals with preventing unintended reactions, which is not the primary role of a detonator. Increasing the explosive yield relates to amplication methods or formulations but is not directly a function of the detonator itself. Initiating a delay can be a feature of some detonators that are designed to set off explosives after a preset period, but this is a subset of ignition functions and does not encompass the broad purpose of all detonators. Thus, providing ignition is the fundamental role that defines the detonator in an explosive device.