What type of bomb requires the victim to take action to trigger the device?

The correct choice is the action bomb, commonly referred to as a booby trap. This type of explosive device is specifically designed to require an action from the victim or an unsuspecting individual to detonate it. The principle behind this type of bomb is to lure the victim into a situation where their movement or handling of the device will trigger the explosion, making it particularly insidious.

Action bombs can utilize various mechanisms for detonation, such as tripwires, pressure plates, or other triggering actions that need to be initiated by the victim themselves. This method creates a heightened sense of danger and an element of surprise, as the victim is often unaware that they are about to activate the device.

In contrast, remote-controlled bombs can be detonated from a distance by an individual who is not present at the location of the bomb, making them less reliant on the actions of the victim. Time bombs are designed to explode at a pre-set time, removing the need for any victim interaction. Improvised explosive devices (IEDs) could include any of these types, but they are a broader category that encompasses various methods of activation, not specifically requiring victim action. Thus, the specific characteristic of the action bomb clearly distinguishes it from the other options.